What causes multiple simultaneous shut down times in 'last' command output?

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I am troubleshooting some outage issues on a server, with the suspicion that the server is restarting intermittently. When I run the last command, I see the following output (I added line numbers for clarity):



01. root@nina-xms-dev:/home/nina# last
02. nina pts/0 192.168.2.1 Wed Jan 30 12:09 still logged in
03. reboot system boot 4.15.0-44-generi Wed Jan 30 12:09 still running
04. nina pts/0 192.168.2.1 Wed Jan 30 11:59 - crash (00:09)
05. reboot system boot 4.15.0-44-generi Wed Jan 30 11:55 still running
06. nina pts/0 192.168.2.1 Wed Jan 30 11:48 - 11:54 (00:06)
07. reboot system boot 4.15.0-44-generi Wed Jan 30 11:47 - 11:54 (00:07)
08. nina pts/0 192.168.2.1 Wed Jan 30 11:45 - crash (00:01)
09. reboot system boot 4.15.0-44-generi Wed Jan 30 11:34 - 11:54 (00:20)
10. reboot system boot 4.15.0-44-generi Wed Jan 30 11:23 - 11:54 (00:31)
11. reboot system boot 4.15.0-44-generi Wed Jan 30 11:08 - 11:54 (00:45)
12. reboot system boot 4.15.0-44-generi Wed Jan 30 10:58 - 11:54 (00:55)
13. reboot system boot 4.15.0-44-generi Wed Jan 30 10:50 - 11:54 (01:04)
14. reboot system boot 4.15.0-44-generi Wed Jan 30 10:31 - 11:54 (01:23)
15. reboot system boot 4.15.0-44-generi Wed Jan 30 10:18 - 11:54 (01:36)
16. reboot system boot 4.15.0-44-generi Wed Jan 30 10:04 - 11:54 (01:50)
17. reboot system boot 4.15.0-44-generi Wed Jan 30 09:49 - 11:54 (02:05)
18. reboot system boot 4.15.0-44-generi Wed Jan 30 09:35 - 11:54 (02:19)
19. reboot system boot 4.15.0-44-generi Wed Jan 30 09:25 - 11:54 (02:29)
20. reboot system boot 4.15.0-44-generi Wed Jan 30 09:18 - 11:54 (02:36)
21. reboot system boot 4.15.0-44-generi Wed Jan 30 09:06 - 11:54 (02:48)
22. reboot system boot 4.15.0-44-generi Wed Jan 30 08:53 - 11:54 (03:01)
23. reboot system boot 4.15.0-44-generi Wed Jan 30 08:44 - 11:54 (03:10)
24. reboot system boot 4.15.0-44-generi Wed Jan 30 08:32 - 11:54 (03:22)
25. reboot system boot 4.15.0-44-generi Wed Jan 30 08:19 - 11:54 (03:35)
26. reboot system boot 4.15.0-44-generi Wed Jan 30 07:59 - 11:54 (03:55)
27. reboot system boot 4.15.0-44-generi Wed Jan 30 07:54 - 11:54 (04:00)
28. reboot system boot 4.15.0-44-generi Wed Jan 30 07:45 - 11:54 (04:09)
29. reboot system boot 4.15.0-44-generi Wed Jan 30 07:33 - 11:54 (04:21)
30. reboot system boot 4.15.0-44-generi Wed Jan 30 07:25 - 11:54 (04:29)
31. reboot system boot 4.15.0-44-generi Wed Jan 30 07:08 - 11:54 (04:46)
32. reboot system boot 4.15.0-44-generi Wed Jan 30 07:00 - 11:54 (04:54)
33. reboot system boot 4.15.0-44-generi Wed Jan 30 06:41 - 11:54 (05:13)
34. reboot system boot 4.15.0-44-generi Wed Jan 30 06:20 - 11:54 (05:34)
35. reboot system boot 4.15.0-44-generi Wed Jan 30 06:02 - 11:54 (05:51)
36. reboot system boot 4.15.0-44-generi Wed Jan 30 05:52 - 11:54 (06:02)
37. reboot system boot 4.15.0-44-generi Wed Jan 30 05:43 - 11:54 (06:11)
38. reboot system boot 4.15.0-44-generi Wed Jan 30 05:28 - 11:54 (06:26)
39. reboot system boot 4.15.0-44-generi Wed Jan 30 05:16 - 11:54 (06:38)
40. reboot system boot 4.15.0-44-generi Wed Jan 30 05:00 - 11:54 (06:54)
41. reboot system boot 4.15.0-44-generi Wed Jan 30 04:48 - 11:54 (07:05)
42. reboot system boot 4.15.0-44-generi Wed Jan 30 04:32 - 11:54 (07:22)
43. reboot system boot 4.15.0-44-generi Wed Jan 30 04:17 - 11:54 (07:37)
44. reboot system boot 4.15.0-44-generi Wed Jan 30 04:09 - 11:54 (07:45)
45. reboot system boot 4.15.0-44-generi Wed Jan 30 03:40 - 11:54 (08:14)
46. reboot system boot 4.15.0-44-generi Wed Jan 30 03:29 - 11:54 (08:25)
47. reboot system boot 4.15.0-44-generi Wed Jan 30 03:17 - 11:54 (08:36)
48. reboot system boot 4.15.0-44-generi Wed Jan 30 03:14 - 11:54 (08:40)
49. reboot system boot 4.15.0-44-generi Wed Jan 30 03:02 - 11:54 (08:52)
50. reboot system boot 4.15.0-44-generi Wed Jan 30 02:51 - 11:54 (09:03)
51. reboot system boot 4.15.0-44-generi Wed Jan 30 02:33 - 11:54 (09:21)
52. reboot system boot 4.15.0-44-generi Wed Jan 30 02:23 - 11:54 (09:31)
53. reboot system boot 4.15.0-44-generi Wed Jan 30 02:15 - 11:54 (09:39)
54. reboot system boot 4.15.0-44-generi Wed Jan 30 02:02 - 11:54 (09:52)
55. reboot system boot 4.15.0-44-generi Wed Jan 30 01:54 - 11:54 (10:00)
56. reboot system boot 4.15.0-44-generi Wed Jan 30 01:40 - 11:54 (10:14)
57. reboot system boot 4.15.0-44-generi Wed Jan 30 01:30 - 11:54 (10:24)
58. reboot system boot 4.15.0-44-generi Wed Jan 30 01:21 - 11:54 (10:33)
59. reboot system boot 4.15.0-44-generi Wed Jan 30 01:05 - 11:54 (10:49)
60. reboot system boot 4.15.0-44-generi Wed Jan 30 00:59 - 11:54 (10:55)
61. reboot system boot 4.15.0-44-generi Wed Jan 30 00:46 - 11:54 (11:07)
62. reboot system boot 4.15.0-44-generi Wed Jan 30 00:32 - 11:54 (11:22)
63. reboot system boot 4.15.0-44-generi Wed Jan 30 00:17 - 11:54 (11:37)
64. reboot system boot 4.15.0-44-generi Wed Jan 30 00:03 - 11:54 (11:51)
65. reboot system boot 4.15.0-44-generi Tue Jan 29 23:46 - 11:54 (12:08)
66. reboot system boot 4.15.0-44-generi Tue Jan 29 23:39 - 11:54 (12:15)
67. reboot system boot 4.15.0-44-generi Tue Jan 29 23:34 - 11:54 (12:20)
68. reboot system boot 4.15.0-44-generi Tue Jan 29 23:18 - 11:54 (12:36)
69. reboot system boot 4.15.0-44-generi Tue Jan 29 22:48 - 11:54 (13:05)
70. reboot system boot 4.15.0-44-generi Tue Jan 29 22:44 - 11:54 (13:10)
71. reboot system boot 4.15.0-44-generi Tue Jan 29 22:39 - 11:54 (13:15)
72. reboot system boot 4.15.0-44-generi Tue Jan 29 22:25 - 11:54 (13:29)
73. reboot system boot 4.15.0-44-generi Tue Jan 29 22:19 - 11:54 (13:35)
74. reboot system boot 4.15.0-44-generi Tue Jan 29 22:08 - 11:54 (13:46)
75. reboot system boot 4.15.0-44-generi Tue Jan 29 21:45 - 11:54 (14:09)
76. reboot system boot 4.15.0-44-generi Tue Jan 29 21:24 - 11:54 (14:30)
77. reboot system boot 4.15.0-44-generi Tue Jan 29 21:09 - 11:54 (14:45)
78. reboot system boot 4.15.0-44-generi Tue Jan 29 20:58 - 11:54 (14:56)
79. reboot system boot 4.15.0-44-generi Tue Jan 29 20:43 - 11:54 (15:11)
80. reboot system boot 4.15.0-44-generi Tue Jan 29 20:40 - 11:54 (15:14)
81. reboot system boot 4.15.0-44-generi Tue Jan 29 20:30 - 11:54 (15:24)
82. reboot system boot 4.15.0-44-generi Tue Jan 29 20:20 - 11:54 (15:34)
83. reboot system boot 4.15.0-44-generi Tue Jan 29 20:13 - 11:54 (15:41)
84. reboot system boot 4.15.0-44-generi Tue Jan 29 20:07 - 11:54 (15:46)
85. reboot system boot 4.15.0-44-generi Tue Jan 29 19:49 - 11:54 (16:05)
86. reboot system boot 4.15.0-44-generi Tue Jan 29 19:24 - 11:54 (16:30)
87. reboot system boot 4.15.0-44-generi Tue Jan 29 19:09 - 11:54 (16:45)
88. reboot system boot 4.15.0-44-generi Tue Jan 29 18:51 - 11:54 (17:03)
89. reboot system boot 4.15.0-44-generi Tue Jan 29 18:36 - 11:54 (17:18)
90. reboot system boot 4.15.0-44-generi Tue Jan 29 18:18 - 11:54 (17:36)
91. reboot system boot 4.15.0-44-generi Tue Jan 29 18:08 - 11:54 (17:46)
92. reboot system boot 4.15.0-44-generi Tue Jan 29 17:57 - 11:54 (17:57)
93. reboot system boot 4.15.0-44-generi Tue Jan 29 17:31 - 11:54 (18:23)
94. reboot system boot 4.15.0-44-generi Tue Jan 29 17:18 - 11:54 (18:36)
95. reboot system boot 4.15.0-44-generi Tue Jan 29 17:02 - 11:54 (18:52)
96. nina pts/0 192.168.1.222 Tue Jan 29 17:00 - crash (00:01)
97. reboot system boot 4.15.0-44-generi Tue Jan 29 16:59 - 11:54 (18:55)
98. nina pts/0 192.168.1.222 Tue Jan 29 16:54 - crash (00:04)
99. reboot system boot 4.15.0-44-generi Tue Jan 29 16:51 - 11:54 (19:03)
100. nina pts/0 192.168.1.222 Tue Jan 29 16:49 - 16:50 (00:00)
101. reboot system boot 4.15.0-44-generi Tue Jan 29 16:39 - 16:50 (00:10)
102. nina pts/0 192.168.1.222 Tue Jan 29 16:07 - crash (00:31)
103. reboot system boot 4.15.0-44-generi Tue Jan 29 16:07 - 16:50 (00:43)
104. nina pts/0 192.168.1.222 Tue Jan 29 15:59 - crash (00:07)
105. reboot system boot 4.15.0-44-generi Tue Jan 29 15:51 - 16:50 (00:59)
106. reboot system boot 4.15.0-44-generi Tue Jan 29 15:46 - 16:50 (01:04)
107. nina pts/0 192.168.1.222 Tue Jan 29 15:38 - 15:45 (00:07)
108. reboot system boot 4.15.0-44-generi Tue Jan 29 15:35 - 15:45 (00:09)
109. nina pts/0 192.168.1.222 Tue Jan 29 15:26 - crash (00:08)
110. reboot system boot 4.15.0-44-generi Tue Jan 29 15:12 - 15:45 (00:32)
111. reboot system boot 4.15.0-44-generi Tue Jan 29 15:02 - 15:45 (00:43)
112. reboot system boot 4.15.0-44-generi Tue Jan 29 14:40 - 15:45 (01:05)
113. reboot system boot 4.15.0-44-generi Tue Jan 29 14:18 - 15:45 (01:27)
114. reboot system boot 4.15.0-44-generi Tue Jan 29 14:08 - 15:45 (01:36)
115. reboot system boot 4.15.0-44-generi Tue Jan 29 13:41 - 15:45 (02:04)
116. reboot system boot 4.15.0-44-generi Tue Jan 29 13:36 - 15:45 (02:08)
117. reboot system boot 4.15.0-44-generi Tue Jan 29 13:27 - 15:45 (02:17)
118. reboot system boot 4.15.0-44-generi Tue Jan 29 13:14 - 15:45 (02:30)
119. reboot system boot 4.15.0-44-generi Tue Jan 29 13:01 - 15:45 (02:44)
120. reboot system boot 4.15.0-44-generi Tue Jan 29 12:41 - 15:45 (03:03)
121. reboot system boot 4.15.0-44-generi Tue Jan 29 12:34 - 15:45 (03:10)
122. reboot system boot 4.15.0-44-generi Tue Jan 29 12:27 - 15:45 (03:17)
123. reboot system boot 4.15.0-44-generi Tue Jan 29 12:13 - 15:45 (03:31)
124. reboot system boot 4.15.0-44-generi Tue Jan 29 11:57 - 15:45 (03:48)
125. reboot system boot 4.15.0-44-generi Tue Jan 29 11:48 - 15:45 (03:57)
126. reboot system boot 4.15.0-44-generi Tue Jan 29 11:16 - 15:45 (04:28)
127. reboot system boot 4.15.0-44-generi Tue Jan 29 10:16 - 15:45 (05:28)
128. reboot system boot 4.15.0-44-generi Tue Jan 29 09:08 - 15:45 (06:36)
129. reboot system boot 4.15.0-44-generi Tue Jan 29 07:38 - 15:45 (08:06)
130. reboot system boot 4.15.0-44-generi Tue Jan 29 06:45 - 15:45 (08:59)
131. reboot system boot 4.15.0-44-generi Tue Jan 29 05:10 - 15:45 (10:34)
132. reboot system boot 4.15.0-44-generi Tue Jan 29 04:36 - 15:45 (11:09)
133. reboot system boot 4.15.0-44-generi Tue Jan 29 03:48 - 15:45 (11:56)
134. reboot system boot 4.15.0-44-generi Tue Jan 29 03:08 - 15:45 (12:37)
135. reboot system boot 4.15.0-44-generi Tue Jan 29 02:19 - 15:45 (13:26)
136. reboot system boot 4.15.0-44-generi Tue Jan 29 00:18 - 15:45 (15:27)
137. reboot system boot 4.15.0-44-generi Mon Jan 28 23:45 - 15:45 (15:59)
138. reboot system boot 4.15.0-43-generi Mon Jan 28 20:49 - 15:45 (18:56)
139. reboot system boot 4.15.0-43-generi Mon Jan 28 19:54 - 15:45 (19:51)
140. reboot system boot 4.15.0-43-generi Mon Jan 28 19:21 - 15:45 (20:23)
141. reboot system boot 4.15.0-43-generi Mon Jan 28 17:14 - 15:45 (22:31)
142. reboot system boot 4.15.0-43-generi Mon Jan 28 14:03 - 15:45 (1+01:42)
143. reboot system boot 4.15.0-43-generi Mon Jan 28 13:33 - 15:45 (1+02:11)
144. nina pts/0 192.168.1.222 Mon Jan 28 10:54 - 11:04 (00:10)
145. reboot system boot 4.15.0-43-generi Mon Jan 28 10:53 - 15:45 (1+04:51)
146. nina pts/0 192.168.1.222 Mon Jan 28 10:42 - 10:53 (00:10)
147. reboot system boot 4.15.0-43-generi Mon Jan 28 10:39 - 10:53 (00:13)
148. nina pts/0 192.168.1.222 Mon Jan 28 10:35 - crash (00:03)
149. reboot system boot 4.15.0-43-generi Mon Jan 28 05:40 - 10:53 (05:12)
150. reboot system boot 4.15.0-43-generi Mon Jan 28 03:25 - 10:53 (07:27)
151. ... etc....


Given this line:



09. reboot system boot 4.15.0-44-generi Wed Jan 30 11:34 - 11:54 (00:20)


My understanding is that the line above is saying that the system started up at 11:34, was up for 20 minutes, and then was shut down at 11:54.



What I don't understand is that given multiple lines that repeat with the same shut down time:



09. reboot system boot 4.15.0-44-generi Wed Jan 30 11:34 - 11:54 (00:20)
10. reboot system boot 4.15.0-44-generi Wed Jan 30 11:23 - 11:54 (00:31)
11. reboot system boot 4.15.0-44-generi Wed Jan 30 11:08 - 11:54 (00:45)
12. reboot system boot 4.15.0-44-generi Wed Jan 30 10:58 - 11:54 (00:55)
13. reboot system boot 4.15.0-44-generi Wed Jan 30 10:50 - 11:54 (01:04)


Line 10 says the computer started up at 11:23, line 11 says the computer was started at 11:08, line 12 says 10:58, and line 13 says 10:50... but all of them say that the shut down time was 11:54.



Instead, I would expect each shut down time to have ended before the proceeding start up. Something more like this:



09. reboot system boot 4.15.0-44-generi Wed Jan 30 11:34 - 11:54 (00:20)
10. reboot system boot 4.15.0-44-generi Wed Jan 30 11:23 - 11:33 (00:10)
11. reboot system boot 4.15.0-44-generi Wed Jan 30 11:08 - 11:22 (00:14)
12. reboot system boot 4.15.0-44-generi Wed Jan 30 10:58 - 11:07 (00:09)
13. reboot system boot 4.15.0-44-generi Wed Jan 30 10:50 - 11:57 (00:07)


Should I assume that there were un-recorded shutdowns between each of those periods (not just the 11:54 one?), OR should I assume that there were not actual separate start ups at each of those times, and the server was on for the whole time?



Are there other log files to correlate the log of start up and shut down events?










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    I am troubleshooting some outage issues on a server, with the suspicion that the server is restarting intermittently. When I run the last command, I see the following output (I added line numbers for clarity):



    01. root@nina-xms-dev:/home/nina# last
    02. nina pts/0 192.168.2.1 Wed Jan 30 12:09 still logged in
    03. reboot system boot 4.15.0-44-generi Wed Jan 30 12:09 still running
    04. nina pts/0 192.168.2.1 Wed Jan 30 11:59 - crash (00:09)
    05. reboot system boot 4.15.0-44-generi Wed Jan 30 11:55 still running
    06. nina pts/0 192.168.2.1 Wed Jan 30 11:48 - 11:54 (00:06)
    07. reboot system boot 4.15.0-44-generi Wed Jan 30 11:47 - 11:54 (00:07)
    08. nina pts/0 192.168.2.1 Wed Jan 30 11:45 - crash (00:01)
    09. reboot system boot 4.15.0-44-generi Wed Jan 30 11:34 - 11:54 (00:20)
    10. reboot system boot 4.15.0-44-generi Wed Jan 30 11:23 - 11:54 (00:31)
    11. reboot system boot 4.15.0-44-generi Wed Jan 30 11:08 - 11:54 (00:45)
    12. reboot system boot 4.15.0-44-generi Wed Jan 30 10:58 - 11:54 (00:55)
    13. reboot system boot 4.15.0-44-generi Wed Jan 30 10:50 - 11:54 (01:04)
    14. reboot system boot 4.15.0-44-generi Wed Jan 30 10:31 - 11:54 (01:23)
    15. reboot system boot 4.15.0-44-generi Wed Jan 30 10:18 - 11:54 (01:36)
    16. reboot system boot 4.15.0-44-generi Wed Jan 30 10:04 - 11:54 (01:50)
    17. reboot system boot 4.15.0-44-generi Wed Jan 30 09:49 - 11:54 (02:05)
    18. reboot system boot 4.15.0-44-generi Wed Jan 30 09:35 - 11:54 (02:19)
    19. reboot system boot 4.15.0-44-generi Wed Jan 30 09:25 - 11:54 (02:29)
    20. reboot system boot 4.15.0-44-generi Wed Jan 30 09:18 - 11:54 (02:36)
    21. reboot system boot 4.15.0-44-generi Wed Jan 30 09:06 - 11:54 (02:48)
    22. reboot system boot 4.15.0-44-generi Wed Jan 30 08:53 - 11:54 (03:01)
    23. reboot system boot 4.15.0-44-generi Wed Jan 30 08:44 - 11:54 (03:10)
    24. reboot system boot 4.15.0-44-generi Wed Jan 30 08:32 - 11:54 (03:22)
    25. reboot system boot 4.15.0-44-generi Wed Jan 30 08:19 - 11:54 (03:35)
    26. reboot system boot 4.15.0-44-generi Wed Jan 30 07:59 - 11:54 (03:55)
    27. reboot system boot 4.15.0-44-generi Wed Jan 30 07:54 - 11:54 (04:00)
    28. reboot system boot 4.15.0-44-generi Wed Jan 30 07:45 - 11:54 (04:09)
    29. reboot system boot 4.15.0-44-generi Wed Jan 30 07:33 - 11:54 (04:21)
    30. reboot system boot 4.15.0-44-generi Wed Jan 30 07:25 - 11:54 (04:29)
    31. reboot system boot 4.15.0-44-generi Wed Jan 30 07:08 - 11:54 (04:46)
    32. reboot system boot 4.15.0-44-generi Wed Jan 30 07:00 - 11:54 (04:54)
    33. reboot system boot 4.15.0-44-generi Wed Jan 30 06:41 - 11:54 (05:13)
    34. reboot system boot 4.15.0-44-generi Wed Jan 30 06:20 - 11:54 (05:34)
    35. reboot system boot 4.15.0-44-generi Wed Jan 30 06:02 - 11:54 (05:51)
    36. reboot system boot 4.15.0-44-generi Wed Jan 30 05:52 - 11:54 (06:02)
    37. reboot system boot 4.15.0-44-generi Wed Jan 30 05:43 - 11:54 (06:11)
    38. reboot system boot 4.15.0-44-generi Wed Jan 30 05:28 - 11:54 (06:26)
    39. reboot system boot 4.15.0-44-generi Wed Jan 30 05:16 - 11:54 (06:38)
    40. reboot system boot 4.15.0-44-generi Wed Jan 30 05:00 - 11:54 (06:54)
    41. reboot system boot 4.15.0-44-generi Wed Jan 30 04:48 - 11:54 (07:05)
    42. reboot system boot 4.15.0-44-generi Wed Jan 30 04:32 - 11:54 (07:22)
    43. reboot system boot 4.15.0-44-generi Wed Jan 30 04:17 - 11:54 (07:37)
    44. reboot system boot 4.15.0-44-generi Wed Jan 30 04:09 - 11:54 (07:45)
    45. reboot system boot 4.15.0-44-generi Wed Jan 30 03:40 - 11:54 (08:14)
    46. reboot system boot 4.15.0-44-generi Wed Jan 30 03:29 - 11:54 (08:25)
    47. reboot system boot 4.15.0-44-generi Wed Jan 30 03:17 - 11:54 (08:36)
    48. reboot system boot 4.15.0-44-generi Wed Jan 30 03:14 - 11:54 (08:40)
    49. reboot system boot 4.15.0-44-generi Wed Jan 30 03:02 - 11:54 (08:52)
    50. reboot system boot 4.15.0-44-generi Wed Jan 30 02:51 - 11:54 (09:03)
    51. reboot system boot 4.15.0-44-generi Wed Jan 30 02:33 - 11:54 (09:21)
    52. reboot system boot 4.15.0-44-generi Wed Jan 30 02:23 - 11:54 (09:31)
    53. reboot system boot 4.15.0-44-generi Wed Jan 30 02:15 - 11:54 (09:39)
    54. reboot system boot 4.15.0-44-generi Wed Jan 30 02:02 - 11:54 (09:52)
    55. reboot system boot 4.15.0-44-generi Wed Jan 30 01:54 - 11:54 (10:00)
    56. reboot system boot 4.15.0-44-generi Wed Jan 30 01:40 - 11:54 (10:14)
    57. reboot system boot 4.15.0-44-generi Wed Jan 30 01:30 - 11:54 (10:24)
    58. reboot system boot 4.15.0-44-generi Wed Jan 30 01:21 - 11:54 (10:33)
    59. reboot system boot 4.15.0-44-generi Wed Jan 30 01:05 - 11:54 (10:49)
    60. reboot system boot 4.15.0-44-generi Wed Jan 30 00:59 - 11:54 (10:55)
    61. reboot system boot 4.15.0-44-generi Wed Jan 30 00:46 - 11:54 (11:07)
    62. reboot system boot 4.15.0-44-generi Wed Jan 30 00:32 - 11:54 (11:22)
    63. reboot system boot 4.15.0-44-generi Wed Jan 30 00:17 - 11:54 (11:37)
    64. reboot system boot 4.15.0-44-generi Wed Jan 30 00:03 - 11:54 (11:51)
    65. reboot system boot 4.15.0-44-generi Tue Jan 29 23:46 - 11:54 (12:08)
    66. reboot system boot 4.15.0-44-generi Tue Jan 29 23:39 - 11:54 (12:15)
    67. reboot system boot 4.15.0-44-generi Tue Jan 29 23:34 - 11:54 (12:20)
    68. reboot system boot 4.15.0-44-generi Tue Jan 29 23:18 - 11:54 (12:36)
    69. reboot system boot 4.15.0-44-generi Tue Jan 29 22:48 - 11:54 (13:05)
    70. reboot system boot 4.15.0-44-generi Tue Jan 29 22:44 - 11:54 (13:10)
    71. reboot system boot 4.15.0-44-generi Tue Jan 29 22:39 - 11:54 (13:15)
    72. reboot system boot 4.15.0-44-generi Tue Jan 29 22:25 - 11:54 (13:29)
    73. reboot system boot 4.15.0-44-generi Tue Jan 29 22:19 - 11:54 (13:35)
    74. reboot system boot 4.15.0-44-generi Tue Jan 29 22:08 - 11:54 (13:46)
    75. reboot system boot 4.15.0-44-generi Tue Jan 29 21:45 - 11:54 (14:09)
    76. reboot system boot 4.15.0-44-generi Tue Jan 29 21:24 - 11:54 (14:30)
    77. reboot system boot 4.15.0-44-generi Tue Jan 29 21:09 - 11:54 (14:45)
    78. reboot system boot 4.15.0-44-generi Tue Jan 29 20:58 - 11:54 (14:56)
    79. reboot system boot 4.15.0-44-generi Tue Jan 29 20:43 - 11:54 (15:11)
    80. reboot system boot 4.15.0-44-generi Tue Jan 29 20:40 - 11:54 (15:14)
    81. reboot system boot 4.15.0-44-generi Tue Jan 29 20:30 - 11:54 (15:24)
    82. reboot system boot 4.15.0-44-generi Tue Jan 29 20:20 - 11:54 (15:34)
    83. reboot system boot 4.15.0-44-generi Tue Jan 29 20:13 - 11:54 (15:41)
    84. reboot system boot 4.15.0-44-generi Tue Jan 29 20:07 - 11:54 (15:46)
    85. reboot system boot 4.15.0-44-generi Tue Jan 29 19:49 - 11:54 (16:05)
    86. reboot system boot 4.15.0-44-generi Tue Jan 29 19:24 - 11:54 (16:30)
    87. reboot system boot 4.15.0-44-generi Tue Jan 29 19:09 - 11:54 (16:45)
    88. reboot system boot 4.15.0-44-generi Tue Jan 29 18:51 - 11:54 (17:03)
    89. reboot system boot 4.15.0-44-generi Tue Jan 29 18:36 - 11:54 (17:18)
    90. reboot system boot 4.15.0-44-generi Tue Jan 29 18:18 - 11:54 (17:36)
    91. reboot system boot 4.15.0-44-generi Tue Jan 29 18:08 - 11:54 (17:46)
    92. reboot system boot 4.15.0-44-generi Tue Jan 29 17:57 - 11:54 (17:57)
    93. reboot system boot 4.15.0-44-generi Tue Jan 29 17:31 - 11:54 (18:23)
    94. reboot system boot 4.15.0-44-generi Tue Jan 29 17:18 - 11:54 (18:36)
    95. reboot system boot 4.15.0-44-generi Tue Jan 29 17:02 - 11:54 (18:52)
    96. nina pts/0 192.168.1.222 Tue Jan 29 17:00 - crash (00:01)
    97. reboot system boot 4.15.0-44-generi Tue Jan 29 16:59 - 11:54 (18:55)
    98. nina pts/0 192.168.1.222 Tue Jan 29 16:54 - crash (00:04)
    99. reboot system boot 4.15.0-44-generi Tue Jan 29 16:51 - 11:54 (19:03)
    100. nina pts/0 192.168.1.222 Tue Jan 29 16:49 - 16:50 (00:00)
    101. reboot system boot 4.15.0-44-generi Tue Jan 29 16:39 - 16:50 (00:10)
    102. nina pts/0 192.168.1.222 Tue Jan 29 16:07 - crash (00:31)
    103. reboot system boot 4.15.0-44-generi Tue Jan 29 16:07 - 16:50 (00:43)
    104. nina pts/0 192.168.1.222 Tue Jan 29 15:59 - crash (00:07)
    105. reboot system boot 4.15.0-44-generi Tue Jan 29 15:51 - 16:50 (00:59)
    106. reboot system boot 4.15.0-44-generi Tue Jan 29 15:46 - 16:50 (01:04)
    107. nina pts/0 192.168.1.222 Tue Jan 29 15:38 - 15:45 (00:07)
    108. reboot system boot 4.15.0-44-generi Tue Jan 29 15:35 - 15:45 (00:09)
    109. nina pts/0 192.168.1.222 Tue Jan 29 15:26 - crash (00:08)
    110. reboot system boot 4.15.0-44-generi Tue Jan 29 15:12 - 15:45 (00:32)
    111. reboot system boot 4.15.0-44-generi Tue Jan 29 15:02 - 15:45 (00:43)
    112. reboot system boot 4.15.0-44-generi Tue Jan 29 14:40 - 15:45 (01:05)
    113. reboot system boot 4.15.0-44-generi Tue Jan 29 14:18 - 15:45 (01:27)
    114. reboot system boot 4.15.0-44-generi Tue Jan 29 14:08 - 15:45 (01:36)
    115. reboot system boot 4.15.0-44-generi Tue Jan 29 13:41 - 15:45 (02:04)
    116. reboot system boot 4.15.0-44-generi Tue Jan 29 13:36 - 15:45 (02:08)
    117. reboot system boot 4.15.0-44-generi Tue Jan 29 13:27 - 15:45 (02:17)
    118. reboot system boot 4.15.0-44-generi Tue Jan 29 13:14 - 15:45 (02:30)
    119. reboot system boot 4.15.0-44-generi Tue Jan 29 13:01 - 15:45 (02:44)
    120. reboot system boot 4.15.0-44-generi Tue Jan 29 12:41 - 15:45 (03:03)
    121. reboot system boot 4.15.0-44-generi Tue Jan 29 12:34 - 15:45 (03:10)
    122. reboot system boot 4.15.0-44-generi Tue Jan 29 12:27 - 15:45 (03:17)
    123. reboot system boot 4.15.0-44-generi Tue Jan 29 12:13 - 15:45 (03:31)
    124. reboot system boot 4.15.0-44-generi Tue Jan 29 11:57 - 15:45 (03:48)
    125. reboot system boot 4.15.0-44-generi Tue Jan 29 11:48 - 15:45 (03:57)
    126. reboot system boot 4.15.0-44-generi Tue Jan 29 11:16 - 15:45 (04:28)
    127. reboot system boot 4.15.0-44-generi Tue Jan 29 10:16 - 15:45 (05:28)
    128. reboot system boot 4.15.0-44-generi Tue Jan 29 09:08 - 15:45 (06:36)
    129. reboot system boot 4.15.0-44-generi Tue Jan 29 07:38 - 15:45 (08:06)
    130. reboot system boot 4.15.0-44-generi Tue Jan 29 06:45 - 15:45 (08:59)
    131. reboot system boot 4.15.0-44-generi Tue Jan 29 05:10 - 15:45 (10:34)
    132. reboot system boot 4.15.0-44-generi Tue Jan 29 04:36 - 15:45 (11:09)
    133. reboot system boot 4.15.0-44-generi Tue Jan 29 03:48 - 15:45 (11:56)
    134. reboot system boot 4.15.0-44-generi Tue Jan 29 03:08 - 15:45 (12:37)
    135. reboot system boot 4.15.0-44-generi Tue Jan 29 02:19 - 15:45 (13:26)
    136. reboot system boot 4.15.0-44-generi Tue Jan 29 00:18 - 15:45 (15:27)
    137. reboot system boot 4.15.0-44-generi Mon Jan 28 23:45 - 15:45 (15:59)
    138. reboot system boot 4.15.0-43-generi Mon Jan 28 20:49 - 15:45 (18:56)
    139. reboot system boot 4.15.0-43-generi Mon Jan 28 19:54 - 15:45 (19:51)
    140. reboot system boot 4.15.0-43-generi Mon Jan 28 19:21 - 15:45 (20:23)
    141. reboot system boot 4.15.0-43-generi Mon Jan 28 17:14 - 15:45 (22:31)
    142. reboot system boot 4.15.0-43-generi Mon Jan 28 14:03 - 15:45 (1+01:42)
    143. reboot system boot 4.15.0-43-generi Mon Jan 28 13:33 - 15:45 (1+02:11)
    144. nina pts/0 192.168.1.222 Mon Jan 28 10:54 - 11:04 (00:10)
    145. reboot system boot 4.15.0-43-generi Mon Jan 28 10:53 - 15:45 (1+04:51)
    146. nina pts/0 192.168.1.222 Mon Jan 28 10:42 - 10:53 (00:10)
    147. reboot system boot 4.15.0-43-generi Mon Jan 28 10:39 - 10:53 (00:13)
    148. nina pts/0 192.168.1.222 Mon Jan 28 10:35 - crash (00:03)
    149. reboot system boot 4.15.0-43-generi Mon Jan 28 05:40 - 10:53 (05:12)
    150. reboot system boot 4.15.0-43-generi Mon Jan 28 03:25 - 10:53 (07:27)
    151. ... etc....


    Given this line:



    09. reboot system boot 4.15.0-44-generi Wed Jan 30 11:34 - 11:54 (00:20)


    My understanding is that the line above is saying that the system started up at 11:34, was up for 20 minutes, and then was shut down at 11:54.



    What I don't understand is that given multiple lines that repeat with the same shut down time:



    09. reboot system boot 4.15.0-44-generi Wed Jan 30 11:34 - 11:54 (00:20)
    10. reboot system boot 4.15.0-44-generi Wed Jan 30 11:23 - 11:54 (00:31)
    11. reboot system boot 4.15.0-44-generi Wed Jan 30 11:08 - 11:54 (00:45)
    12. reboot system boot 4.15.0-44-generi Wed Jan 30 10:58 - 11:54 (00:55)
    13. reboot system boot 4.15.0-44-generi Wed Jan 30 10:50 - 11:54 (01:04)


    Line 10 says the computer started up at 11:23, line 11 says the computer was started at 11:08, line 12 says 10:58, and line 13 says 10:50... but all of them say that the shut down time was 11:54.



    Instead, I would expect each shut down time to have ended before the proceeding start up. Something more like this:



    09. reboot system boot 4.15.0-44-generi Wed Jan 30 11:34 - 11:54 (00:20)
    10. reboot system boot 4.15.0-44-generi Wed Jan 30 11:23 - 11:33 (00:10)
    11. reboot system boot 4.15.0-44-generi Wed Jan 30 11:08 - 11:22 (00:14)
    12. reboot system boot 4.15.0-44-generi Wed Jan 30 10:58 - 11:07 (00:09)
    13. reboot system boot 4.15.0-44-generi Wed Jan 30 10:50 - 11:57 (00:07)


    Should I assume that there were un-recorded shutdowns between each of those periods (not just the 11:54 one?), OR should I assume that there were not actual separate start ups at each of those times, and the server was on for the whole time?



    Are there other log files to correlate the log of start up and shut down events?










    share|improve this question


























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      0








      0








      I am troubleshooting some outage issues on a server, with the suspicion that the server is restarting intermittently. When I run the last command, I see the following output (I added line numbers for clarity):



      01. root@nina-xms-dev:/home/nina# last
      02. nina pts/0 192.168.2.1 Wed Jan 30 12:09 still logged in
      03. reboot system boot 4.15.0-44-generi Wed Jan 30 12:09 still running
      04. nina pts/0 192.168.2.1 Wed Jan 30 11:59 - crash (00:09)
      05. reboot system boot 4.15.0-44-generi Wed Jan 30 11:55 still running
      06. nina pts/0 192.168.2.1 Wed Jan 30 11:48 - 11:54 (00:06)
      07. reboot system boot 4.15.0-44-generi Wed Jan 30 11:47 - 11:54 (00:07)
      08. nina pts/0 192.168.2.1 Wed Jan 30 11:45 - crash (00:01)
      09. reboot system boot 4.15.0-44-generi Wed Jan 30 11:34 - 11:54 (00:20)
      10. reboot system boot 4.15.0-44-generi Wed Jan 30 11:23 - 11:54 (00:31)
      11. reboot system boot 4.15.0-44-generi Wed Jan 30 11:08 - 11:54 (00:45)
      12. reboot system boot 4.15.0-44-generi Wed Jan 30 10:58 - 11:54 (00:55)
      13. reboot system boot 4.15.0-44-generi Wed Jan 30 10:50 - 11:54 (01:04)
      14. reboot system boot 4.15.0-44-generi Wed Jan 30 10:31 - 11:54 (01:23)
      15. reboot system boot 4.15.0-44-generi Wed Jan 30 10:18 - 11:54 (01:36)
      16. reboot system boot 4.15.0-44-generi Wed Jan 30 10:04 - 11:54 (01:50)
      17. reboot system boot 4.15.0-44-generi Wed Jan 30 09:49 - 11:54 (02:05)
      18. reboot system boot 4.15.0-44-generi Wed Jan 30 09:35 - 11:54 (02:19)
      19. reboot system boot 4.15.0-44-generi Wed Jan 30 09:25 - 11:54 (02:29)
      20. reboot system boot 4.15.0-44-generi Wed Jan 30 09:18 - 11:54 (02:36)
      21. reboot system boot 4.15.0-44-generi Wed Jan 30 09:06 - 11:54 (02:48)
      22. reboot system boot 4.15.0-44-generi Wed Jan 30 08:53 - 11:54 (03:01)
      23. reboot system boot 4.15.0-44-generi Wed Jan 30 08:44 - 11:54 (03:10)
      24. reboot system boot 4.15.0-44-generi Wed Jan 30 08:32 - 11:54 (03:22)
      25. reboot system boot 4.15.0-44-generi Wed Jan 30 08:19 - 11:54 (03:35)
      26. reboot system boot 4.15.0-44-generi Wed Jan 30 07:59 - 11:54 (03:55)
      27. reboot system boot 4.15.0-44-generi Wed Jan 30 07:54 - 11:54 (04:00)
      28. reboot system boot 4.15.0-44-generi Wed Jan 30 07:45 - 11:54 (04:09)
      29. reboot system boot 4.15.0-44-generi Wed Jan 30 07:33 - 11:54 (04:21)
      30. reboot system boot 4.15.0-44-generi Wed Jan 30 07:25 - 11:54 (04:29)
      31. reboot system boot 4.15.0-44-generi Wed Jan 30 07:08 - 11:54 (04:46)
      32. reboot system boot 4.15.0-44-generi Wed Jan 30 07:00 - 11:54 (04:54)
      33. reboot system boot 4.15.0-44-generi Wed Jan 30 06:41 - 11:54 (05:13)
      34. reboot system boot 4.15.0-44-generi Wed Jan 30 06:20 - 11:54 (05:34)
      35. reboot system boot 4.15.0-44-generi Wed Jan 30 06:02 - 11:54 (05:51)
      36. reboot system boot 4.15.0-44-generi Wed Jan 30 05:52 - 11:54 (06:02)
      37. reboot system boot 4.15.0-44-generi Wed Jan 30 05:43 - 11:54 (06:11)
      38. reboot system boot 4.15.0-44-generi Wed Jan 30 05:28 - 11:54 (06:26)
      39. reboot system boot 4.15.0-44-generi Wed Jan 30 05:16 - 11:54 (06:38)
      40. reboot system boot 4.15.0-44-generi Wed Jan 30 05:00 - 11:54 (06:54)
      41. reboot system boot 4.15.0-44-generi Wed Jan 30 04:48 - 11:54 (07:05)
      42. reboot system boot 4.15.0-44-generi Wed Jan 30 04:32 - 11:54 (07:22)
      43. reboot system boot 4.15.0-44-generi Wed Jan 30 04:17 - 11:54 (07:37)
      44. reboot system boot 4.15.0-44-generi Wed Jan 30 04:09 - 11:54 (07:45)
      45. reboot system boot 4.15.0-44-generi Wed Jan 30 03:40 - 11:54 (08:14)
      46. reboot system boot 4.15.0-44-generi Wed Jan 30 03:29 - 11:54 (08:25)
      47. reboot system boot 4.15.0-44-generi Wed Jan 30 03:17 - 11:54 (08:36)
      48. reboot system boot 4.15.0-44-generi Wed Jan 30 03:14 - 11:54 (08:40)
      49. reboot system boot 4.15.0-44-generi Wed Jan 30 03:02 - 11:54 (08:52)
      50. reboot system boot 4.15.0-44-generi Wed Jan 30 02:51 - 11:54 (09:03)
      51. reboot system boot 4.15.0-44-generi Wed Jan 30 02:33 - 11:54 (09:21)
      52. reboot system boot 4.15.0-44-generi Wed Jan 30 02:23 - 11:54 (09:31)
      53. reboot system boot 4.15.0-44-generi Wed Jan 30 02:15 - 11:54 (09:39)
      54. reboot system boot 4.15.0-44-generi Wed Jan 30 02:02 - 11:54 (09:52)
      55. reboot system boot 4.15.0-44-generi Wed Jan 30 01:54 - 11:54 (10:00)
      56. reboot system boot 4.15.0-44-generi Wed Jan 30 01:40 - 11:54 (10:14)
      57. reboot system boot 4.15.0-44-generi Wed Jan 30 01:30 - 11:54 (10:24)
      58. reboot system boot 4.15.0-44-generi Wed Jan 30 01:21 - 11:54 (10:33)
      59. reboot system boot 4.15.0-44-generi Wed Jan 30 01:05 - 11:54 (10:49)
      60. reboot system boot 4.15.0-44-generi Wed Jan 30 00:59 - 11:54 (10:55)
      61. reboot system boot 4.15.0-44-generi Wed Jan 30 00:46 - 11:54 (11:07)
      62. reboot system boot 4.15.0-44-generi Wed Jan 30 00:32 - 11:54 (11:22)
      63. reboot system boot 4.15.0-44-generi Wed Jan 30 00:17 - 11:54 (11:37)
      64. reboot system boot 4.15.0-44-generi Wed Jan 30 00:03 - 11:54 (11:51)
      65. reboot system boot 4.15.0-44-generi Tue Jan 29 23:46 - 11:54 (12:08)
      66. reboot system boot 4.15.0-44-generi Tue Jan 29 23:39 - 11:54 (12:15)
      67. reboot system boot 4.15.0-44-generi Tue Jan 29 23:34 - 11:54 (12:20)
      68. reboot system boot 4.15.0-44-generi Tue Jan 29 23:18 - 11:54 (12:36)
      69. reboot system boot 4.15.0-44-generi Tue Jan 29 22:48 - 11:54 (13:05)
      70. reboot system boot 4.15.0-44-generi Tue Jan 29 22:44 - 11:54 (13:10)
      71. reboot system boot 4.15.0-44-generi Tue Jan 29 22:39 - 11:54 (13:15)
      72. reboot system boot 4.15.0-44-generi Tue Jan 29 22:25 - 11:54 (13:29)
      73. reboot system boot 4.15.0-44-generi Tue Jan 29 22:19 - 11:54 (13:35)
      74. reboot system boot 4.15.0-44-generi Tue Jan 29 22:08 - 11:54 (13:46)
      75. reboot system boot 4.15.0-44-generi Tue Jan 29 21:45 - 11:54 (14:09)
      76. reboot system boot 4.15.0-44-generi Tue Jan 29 21:24 - 11:54 (14:30)
      77. reboot system boot 4.15.0-44-generi Tue Jan 29 21:09 - 11:54 (14:45)
      78. reboot system boot 4.15.0-44-generi Tue Jan 29 20:58 - 11:54 (14:56)
      79. reboot system boot 4.15.0-44-generi Tue Jan 29 20:43 - 11:54 (15:11)
      80. reboot system boot 4.15.0-44-generi Tue Jan 29 20:40 - 11:54 (15:14)
      81. reboot system boot 4.15.0-44-generi Tue Jan 29 20:30 - 11:54 (15:24)
      82. reboot system boot 4.15.0-44-generi Tue Jan 29 20:20 - 11:54 (15:34)
      83. reboot system boot 4.15.0-44-generi Tue Jan 29 20:13 - 11:54 (15:41)
      84. reboot system boot 4.15.0-44-generi Tue Jan 29 20:07 - 11:54 (15:46)
      85. reboot system boot 4.15.0-44-generi Tue Jan 29 19:49 - 11:54 (16:05)
      86. reboot system boot 4.15.0-44-generi Tue Jan 29 19:24 - 11:54 (16:30)
      87. reboot system boot 4.15.0-44-generi Tue Jan 29 19:09 - 11:54 (16:45)
      88. reboot system boot 4.15.0-44-generi Tue Jan 29 18:51 - 11:54 (17:03)
      89. reboot system boot 4.15.0-44-generi Tue Jan 29 18:36 - 11:54 (17:18)
      90. reboot system boot 4.15.0-44-generi Tue Jan 29 18:18 - 11:54 (17:36)
      91. reboot system boot 4.15.0-44-generi Tue Jan 29 18:08 - 11:54 (17:46)
      92. reboot system boot 4.15.0-44-generi Tue Jan 29 17:57 - 11:54 (17:57)
      93. reboot system boot 4.15.0-44-generi Tue Jan 29 17:31 - 11:54 (18:23)
      94. reboot system boot 4.15.0-44-generi Tue Jan 29 17:18 - 11:54 (18:36)
      95. reboot system boot 4.15.0-44-generi Tue Jan 29 17:02 - 11:54 (18:52)
      96. nina pts/0 192.168.1.222 Tue Jan 29 17:00 - crash (00:01)
      97. reboot system boot 4.15.0-44-generi Tue Jan 29 16:59 - 11:54 (18:55)
      98. nina pts/0 192.168.1.222 Tue Jan 29 16:54 - crash (00:04)
      99. reboot system boot 4.15.0-44-generi Tue Jan 29 16:51 - 11:54 (19:03)
      100. nina pts/0 192.168.1.222 Tue Jan 29 16:49 - 16:50 (00:00)
      101. reboot system boot 4.15.0-44-generi Tue Jan 29 16:39 - 16:50 (00:10)
      102. nina pts/0 192.168.1.222 Tue Jan 29 16:07 - crash (00:31)
      103. reboot system boot 4.15.0-44-generi Tue Jan 29 16:07 - 16:50 (00:43)
      104. nina pts/0 192.168.1.222 Tue Jan 29 15:59 - crash (00:07)
      105. reboot system boot 4.15.0-44-generi Tue Jan 29 15:51 - 16:50 (00:59)
      106. reboot system boot 4.15.0-44-generi Tue Jan 29 15:46 - 16:50 (01:04)
      107. nina pts/0 192.168.1.222 Tue Jan 29 15:38 - 15:45 (00:07)
      108. reboot system boot 4.15.0-44-generi Tue Jan 29 15:35 - 15:45 (00:09)
      109. nina pts/0 192.168.1.222 Tue Jan 29 15:26 - crash (00:08)
      110. reboot system boot 4.15.0-44-generi Tue Jan 29 15:12 - 15:45 (00:32)
      111. reboot system boot 4.15.0-44-generi Tue Jan 29 15:02 - 15:45 (00:43)
      112. reboot system boot 4.15.0-44-generi Tue Jan 29 14:40 - 15:45 (01:05)
      113. reboot system boot 4.15.0-44-generi Tue Jan 29 14:18 - 15:45 (01:27)
      114. reboot system boot 4.15.0-44-generi Tue Jan 29 14:08 - 15:45 (01:36)
      115. reboot system boot 4.15.0-44-generi Tue Jan 29 13:41 - 15:45 (02:04)
      116. reboot system boot 4.15.0-44-generi Tue Jan 29 13:36 - 15:45 (02:08)
      117. reboot system boot 4.15.0-44-generi Tue Jan 29 13:27 - 15:45 (02:17)
      118. reboot system boot 4.15.0-44-generi Tue Jan 29 13:14 - 15:45 (02:30)
      119. reboot system boot 4.15.0-44-generi Tue Jan 29 13:01 - 15:45 (02:44)
      120. reboot system boot 4.15.0-44-generi Tue Jan 29 12:41 - 15:45 (03:03)
      121. reboot system boot 4.15.0-44-generi Tue Jan 29 12:34 - 15:45 (03:10)
      122. reboot system boot 4.15.0-44-generi Tue Jan 29 12:27 - 15:45 (03:17)
      123. reboot system boot 4.15.0-44-generi Tue Jan 29 12:13 - 15:45 (03:31)
      124. reboot system boot 4.15.0-44-generi Tue Jan 29 11:57 - 15:45 (03:48)
      125. reboot system boot 4.15.0-44-generi Tue Jan 29 11:48 - 15:45 (03:57)
      126. reboot system boot 4.15.0-44-generi Tue Jan 29 11:16 - 15:45 (04:28)
      127. reboot system boot 4.15.0-44-generi Tue Jan 29 10:16 - 15:45 (05:28)
      128. reboot system boot 4.15.0-44-generi Tue Jan 29 09:08 - 15:45 (06:36)
      129. reboot system boot 4.15.0-44-generi Tue Jan 29 07:38 - 15:45 (08:06)
      130. reboot system boot 4.15.0-44-generi Tue Jan 29 06:45 - 15:45 (08:59)
      131. reboot system boot 4.15.0-44-generi Tue Jan 29 05:10 - 15:45 (10:34)
      132. reboot system boot 4.15.0-44-generi Tue Jan 29 04:36 - 15:45 (11:09)
      133. reboot system boot 4.15.0-44-generi Tue Jan 29 03:48 - 15:45 (11:56)
      134. reboot system boot 4.15.0-44-generi Tue Jan 29 03:08 - 15:45 (12:37)
      135. reboot system boot 4.15.0-44-generi Tue Jan 29 02:19 - 15:45 (13:26)
      136. reboot system boot 4.15.0-44-generi Tue Jan 29 00:18 - 15:45 (15:27)
      137. reboot system boot 4.15.0-44-generi Mon Jan 28 23:45 - 15:45 (15:59)
      138. reboot system boot 4.15.0-43-generi Mon Jan 28 20:49 - 15:45 (18:56)
      139. reboot system boot 4.15.0-43-generi Mon Jan 28 19:54 - 15:45 (19:51)
      140. reboot system boot 4.15.0-43-generi Mon Jan 28 19:21 - 15:45 (20:23)
      141. reboot system boot 4.15.0-43-generi Mon Jan 28 17:14 - 15:45 (22:31)
      142. reboot system boot 4.15.0-43-generi Mon Jan 28 14:03 - 15:45 (1+01:42)
      143. reboot system boot 4.15.0-43-generi Mon Jan 28 13:33 - 15:45 (1+02:11)
      144. nina pts/0 192.168.1.222 Mon Jan 28 10:54 - 11:04 (00:10)
      145. reboot system boot 4.15.0-43-generi Mon Jan 28 10:53 - 15:45 (1+04:51)
      146. nina pts/0 192.168.1.222 Mon Jan 28 10:42 - 10:53 (00:10)
      147. reboot system boot 4.15.0-43-generi Mon Jan 28 10:39 - 10:53 (00:13)
      148. nina pts/0 192.168.1.222 Mon Jan 28 10:35 - crash (00:03)
      149. reboot system boot 4.15.0-43-generi Mon Jan 28 05:40 - 10:53 (05:12)
      150. reboot system boot 4.15.0-43-generi Mon Jan 28 03:25 - 10:53 (07:27)
      151. ... etc....


      Given this line:



      09. reboot system boot 4.15.0-44-generi Wed Jan 30 11:34 - 11:54 (00:20)


      My understanding is that the line above is saying that the system started up at 11:34, was up for 20 minutes, and then was shut down at 11:54.



      What I don't understand is that given multiple lines that repeat with the same shut down time:



      09. reboot system boot 4.15.0-44-generi Wed Jan 30 11:34 - 11:54 (00:20)
      10. reboot system boot 4.15.0-44-generi Wed Jan 30 11:23 - 11:54 (00:31)
      11. reboot system boot 4.15.0-44-generi Wed Jan 30 11:08 - 11:54 (00:45)
      12. reboot system boot 4.15.0-44-generi Wed Jan 30 10:58 - 11:54 (00:55)
      13. reboot system boot 4.15.0-44-generi Wed Jan 30 10:50 - 11:54 (01:04)


      Line 10 says the computer started up at 11:23, line 11 says the computer was started at 11:08, line 12 says 10:58, and line 13 says 10:50... but all of them say that the shut down time was 11:54.



      Instead, I would expect each shut down time to have ended before the proceeding start up. Something more like this:



      09. reboot system boot 4.15.0-44-generi Wed Jan 30 11:34 - 11:54 (00:20)
      10. reboot system boot 4.15.0-44-generi Wed Jan 30 11:23 - 11:33 (00:10)
      11. reboot system boot 4.15.0-44-generi Wed Jan 30 11:08 - 11:22 (00:14)
      12. reboot system boot 4.15.0-44-generi Wed Jan 30 10:58 - 11:07 (00:09)
      13. reboot system boot 4.15.0-44-generi Wed Jan 30 10:50 - 11:57 (00:07)


      Should I assume that there were un-recorded shutdowns between each of those periods (not just the 11:54 one?), OR should I assume that there were not actual separate start ups at each of those times, and the server was on for the whole time?



      Are there other log files to correlate the log of start up and shut down events?










      share|improve this question
















      I am troubleshooting some outage issues on a server, with the suspicion that the server is restarting intermittently. When I run the last command, I see the following output (I added line numbers for clarity):



      01. root@nina-xms-dev:/home/nina# last
      02. nina pts/0 192.168.2.1 Wed Jan 30 12:09 still logged in
      03. reboot system boot 4.15.0-44-generi Wed Jan 30 12:09 still running
      04. nina pts/0 192.168.2.1 Wed Jan 30 11:59 - crash (00:09)
      05. reboot system boot 4.15.0-44-generi Wed Jan 30 11:55 still running
      06. nina pts/0 192.168.2.1 Wed Jan 30 11:48 - 11:54 (00:06)
      07. reboot system boot 4.15.0-44-generi Wed Jan 30 11:47 - 11:54 (00:07)
      08. nina pts/0 192.168.2.1 Wed Jan 30 11:45 - crash (00:01)
      09. reboot system boot 4.15.0-44-generi Wed Jan 30 11:34 - 11:54 (00:20)
      10. reboot system boot 4.15.0-44-generi Wed Jan 30 11:23 - 11:54 (00:31)
      11. reboot system boot 4.15.0-44-generi Wed Jan 30 11:08 - 11:54 (00:45)
      12. reboot system boot 4.15.0-44-generi Wed Jan 30 10:58 - 11:54 (00:55)
      13. reboot system boot 4.15.0-44-generi Wed Jan 30 10:50 - 11:54 (01:04)
      14. reboot system boot 4.15.0-44-generi Wed Jan 30 10:31 - 11:54 (01:23)
      15. reboot system boot 4.15.0-44-generi Wed Jan 30 10:18 - 11:54 (01:36)
      16. reboot system boot 4.15.0-44-generi Wed Jan 30 10:04 - 11:54 (01:50)
      17. reboot system boot 4.15.0-44-generi Wed Jan 30 09:49 - 11:54 (02:05)
      18. reboot system boot 4.15.0-44-generi Wed Jan 30 09:35 - 11:54 (02:19)
      19. reboot system boot 4.15.0-44-generi Wed Jan 30 09:25 - 11:54 (02:29)
      20. reboot system boot 4.15.0-44-generi Wed Jan 30 09:18 - 11:54 (02:36)
      21. reboot system boot 4.15.0-44-generi Wed Jan 30 09:06 - 11:54 (02:48)
      22. reboot system boot 4.15.0-44-generi Wed Jan 30 08:53 - 11:54 (03:01)
      23. reboot system boot 4.15.0-44-generi Wed Jan 30 08:44 - 11:54 (03:10)
      24. reboot system boot 4.15.0-44-generi Wed Jan 30 08:32 - 11:54 (03:22)
      25. reboot system boot 4.15.0-44-generi Wed Jan 30 08:19 - 11:54 (03:35)
      26. reboot system boot 4.15.0-44-generi Wed Jan 30 07:59 - 11:54 (03:55)
      27. reboot system boot 4.15.0-44-generi Wed Jan 30 07:54 - 11:54 (04:00)
      28. reboot system boot 4.15.0-44-generi Wed Jan 30 07:45 - 11:54 (04:09)
      29. reboot system boot 4.15.0-44-generi Wed Jan 30 07:33 - 11:54 (04:21)
      30. reboot system boot 4.15.0-44-generi Wed Jan 30 07:25 - 11:54 (04:29)
      31. reboot system boot 4.15.0-44-generi Wed Jan 30 07:08 - 11:54 (04:46)
      32. reboot system boot 4.15.0-44-generi Wed Jan 30 07:00 - 11:54 (04:54)
      33. reboot system boot 4.15.0-44-generi Wed Jan 30 06:41 - 11:54 (05:13)
      34. reboot system boot 4.15.0-44-generi Wed Jan 30 06:20 - 11:54 (05:34)
      35. reboot system boot 4.15.0-44-generi Wed Jan 30 06:02 - 11:54 (05:51)
      36. reboot system boot 4.15.0-44-generi Wed Jan 30 05:52 - 11:54 (06:02)
      37. reboot system boot 4.15.0-44-generi Wed Jan 30 05:43 - 11:54 (06:11)
      38. reboot system boot 4.15.0-44-generi Wed Jan 30 05:28 - 11:54 (06:26)
      39. reboot system boot 4.15.0-44-generi Wed Jan 30 05:16 - 11:54 (06:38)
      40. reboot system boot 4.15.0-44-generi Wed Jan 30 05:00 - 11:54 (06:54)
      41. reboot system boot 4.15.0-44-generi Wed Jan 30 04:48 - 11:54 (07:05)
      42. reboot system boot 4.15.0-44-generi Wed Jan 30 04:32 - 11:54 (07:22)
      43. reboot system boot 4.15.0-44-generi Wed Jan 30 04:17 - 11:54 (07:37)
      44. reboot system boot 4.15.0-44-generi Wed Jan 30 04:09 - 11:54 (07:45)
      45. reboot system boot 4.15.0-44-generi Wed Jan 30 03:40 - 11:54 (08:14)
      46. reboot system boot 4.15.0-44-generi Wed Jan 30 03:29 - 11:54 (08:25)
      47. reboot system boot 4.15.0-44-generi Wed Jan 30 03:17 - 11:54 (08:36)
      48. reboot system boot 4.15.0-44-generi Wed Jan 30 03:14 - 11:54 (08:40)
      49. reboot system boot 4.15.0-44-generi Wed Jan 30 03:02 - 11:54 (08:52)
      50. reboot system boot 4.15.0-44-generi Wed Jan 30 02:51 - 11:54 (09:03)
      51. reboot system boot 4.15.0-44-generi Wed Jan 30 02:33 - 11:54 (09:21)
      52. reboot system boot 4.15.0-44-generi Wed Jan 30 02:23 - 11:54 (09:31)
      53. reboot system boot 4.15.0-44-generi Wed Jan 30 02:15 - 11:54 (09:39)
      54. reboot system boot 4.15.0-44-generi Wed Jan 30 02:02 - 11:54 (09:52)
      55. reboot system boot 4.15.0-44-generi Wed Jan 30 01:54 - 11:54 (10:00)
      56. reboot system boot 4.15.0-44-generi Wed Jan 30 01:40 - 11:54 (10:14)
      57. reboot system boot 4.15.0-44-generi Wed Jan 30 01:30 - 11:54 (10:24)
      58. reboot system boot 4.15.0-44-generi Wed Jan 30 01:21 - 11:54 (10:33)
      59. reboot system boot 4.15.0-44-generi Wed Jan 30 01:05 - 11:54 (10:49)
      60. reboot system boot 4.15.0-44-generi Wed Jan 30 00:59 - 11:54 (10:55)
      61. reboot system boot 4.15.0-44-generi Wed Jan 30 00:46 - 11:54 (11:07)
      62. reboot system boot 4.15.0-44-generi Wed Jan 30 00:32 - 11:54 (11:22)
      63. reboot system boot 4.15.0-44-generi Wed Jan 30 00:17 - 11:54 (11:37)
      64. reboot system boot 4.15.0-44-generi Wed Jan 30 00:03 - 11:54 (11:51)
      65. reboot system boot 4.15.0-44-generi Tue Jan 29 23:46 - 11:54 (12:08)
      66. reboot system boot 4.15.0-44-generi Tue Jan 29 23:39 - 11:54 (12:15)
      67. reboot system boot 4.15.0-44-generi Tue Jan 29 23:34 - 11:54 (12:20)
      68. reboot system boot 4.15.0-44-generi Tue Jan 29 23:18 - 11:54 (12:36)
      69. reboot system boot 4.15.0-44-generi Tue Jan 29 22:48 - 11:54 (13:05)
      70. reboot system boot 4.15.0-44-generi Tue Jan 29 22:44 - 11:54 (13:10)
      71. reboot system boot 4.15.0-44-generi Tue Jan 29 22:39 - 11:54 (13:15)
      72. reboot system boot 4.15.0-44-generi Tue Jan 29 22:25 - 11:54 (13:29)
      73. reboot system boot 4.15.0-44-generi Tue Jan 29 22:19 - 11:54 (13:35)
      74. reboot system boot 4.15.0-44-generi Tue Jan 29 22:08 - 11:54 (13:46)
      75. reboot system boot 4.15.0-44-generi Tue Jan 29 21:45 - 11:54 (14:09)
      76. reboot system boot 4.15.0-44-generi Tue Jan 29 21:24 - 11:54 (14:30)
      77. reboot system boot 4.15.0-44-generi Tue Jan 29 21:09 - 11:54 (14:45)
      78. reboot system boot 4.15.0-44-generi Tue Jan 29 20:58 - 11:54 (14:56)
      79. reboot system boot 4.15.0-44-generi Tue Jan 29 20:43 - 11:54 (15:11)
      80. reboot system boot 4.15.0-44-generi Tue Jan 29 20:40 - 11:54 (15:14)
      81. reboot system boot 4.15.0-44-generi Tue Jan 29 20:30 - 11:54 (15:24)
      82. reboot system boot 4.15.0-44-generi Tue Jan 29 20:20 - 11:54 (15:34)
      83. reboot system boot 4.15.0-44-generi Tue Jan 29 20:13 - 11:54 (15:41)
      84. reboot system boot 4.15.0-44-generi Tue Jan 29 20:07 - 11:54 (15:46)
      85. reboot system boot 4.15.0-44-generi Tue Jan 29 19:49 - 11:54 (16:05)
      86. reboot system boot 4.15.0-44-generi Tue Jan 29 19:24 - 11:54 (16:30)
      87. reboot system boot 4.15.0-44-generi Tue Jan 29 19:09 - 11:54 (16:45)
      88. reboot system boot 4.15.0-44-generi Tue Jan 29 18:51 - 11:54 (17:03)
      89. reboot system boot 4.15.0-44-generi Tue Jan 29 18:36 - 11:54 (17:18)
      90. reboot system boot 4.15.0-44-generi Tue Jan 29 18:18 - 11:54 (17:36)
      91. reboot system boot 4.15.0-44-generi Tue Jan 29 18:08 - 11:54 (17:46)
      92. reboot system boot 4.15.0-44-generi Tue Jan 29 17:57 - 11:54 (17:57)
      93. reboot system boot 4.15.0-44-generi Tue Jan 29 17:31 - 11:54 (18:23)
      94. reboot system boot 4.15.0-44-generi Tue Jan 29 17:18 - 11:54 (18:36)
      95. reboot system boot 4.15.0-44-generi Tue Jan 29 17:02 - 11:54 (18:52)
      96. nina pts/0 192.168.1.222 Tue Jan 29 17:00 - crash (00:01)
      97. reboot system boot 4.15.0-44-generi Tue Jan 29 16:59 - 11:54 (18:55)
      98. nina pts/0 192.168.1.222 Tue Jan 29 16:54 - crash (00:04)
      99. reboot system boot 4.15.0-44-generi Tue Jan 29 16:51 - 11:54 (19:03)
      100. nina pts/0 192.168.1.222 Tue Jan 29 16:49 - 16:50 (00:00)
      101. reboot system boot 4.15.0-44-generi Tue Jan 29 16:39 - 16:50 (00:10)
      102. nina pts/0 192.168.1.222 Tue Jan 29 16:07 - crash (00:31)
      103. reboot system boot 4.15.0-44-generi Tue Jan 29 16:07 - 16:50 (00:43)
      104. nina pts/0 192.168.1.222 Tue Jan 29 15:59 - crash (00:07)
      105. reboot system boot 4.15.0-44-generi Tue Jan 29 15:51 - 16:50 (00:59)
      106. reboot system boot 4.15.0-44-generi Tue Jan 29 15:46 - 16:50 (01:04)
      107. nina pts/0 192.168.1.222 Tue Jan 29 15:38 - 15:45 (00:07)
      108. reboot system boot 4.15.0-44-generi Tue Jan 29 15:35 - 15:45 (00:09)
      109. nina pts/0 192.168.1.222 Tue Jan 29 15:26 - crash (00:08)
      110. reboot system boot 4.15.0-44-generi Tue Jan 29 15:12 - 15:45 (00:32)
      111. reboot system boot 4.15.0-44-generi Tue Jan 29 15:02 - 15:45 (00:43)
      112. reboot system boot 4.15.0-44-generi Tue Jan 29 14:40 - 15:45 (01:05)
      113. reboot system boot 4.15.0-44-generi Tue Jan 29 14:18 - 15:45 (01:27)
      114. reboot system boot 4.15.0-44-generi Tue Jan 29 14:08 - 15:45 (01:36)
      115. reboot system boot 4.15.0-44-generi Tue Jan 29 13:41 - 15:45 (02:04)
      116. reboot system boot 4.15.0-44-generi Tue Jan 29 13:36 - 15:45 (02:08)
      117. reboot system boot 4.15.0-44-generi Tue Jan 29 13:27 - 15:45 (02:17)
      118. reboot system boot 4.15.0-44-generi Tue Jan 29 13:14 - 15:45 (02:30)
      119. reboot system boot 4.15.0-44-generi Tue Jan 29 13:01 - 15:45 (02:44)
      120. reboot system boot 4.15.0-44-generi Tue Jan 29 12:41 - 15:45 (03:03)
      121. reboot system boot 4.15.0-44-generi Tue Jan 29 12:34 - 15:45 (03:10)
      122. reboot system boot 4.15.0-44-generi Tue Jan 29 12:27 - 15:45 (03:17)
      123. reboot system boot 4.15.0-44-generi Tue Jan 29 12:13 - 15:45 (03:31)
      124. reboot system boot 4.15.0-44-generi Tue Jan 29 11:57 - 15:45 (03:48)
      125. reboot system boot 4.15.0-44-generi Tue Jan 29 11:48 - 15:45 (03:57)
      126. reboot system boot 4.15.0-44-generi Tue Jan 29 11:16 - 15:45 (04:28)
      127. reboot system boot 4.15.0-44-generi Tue Jan 29 10:16 - 15:45 (05:28)
      128. reboot system boot 4.15.0-44-generi Tue Jan 29 09:08 - 15:45 (06:36)
      129. reboot system boot 4.15.0-44-generi Tue Jan 29 07:38 - 15:45 (08:06)
      130. reboot system boot 4.15.0-44-generi Tue Jan 29 06:45 - 15:45 (08:59)
      131. reboot system boot 4.15.0-44-generi Tue Jan 29 05:10 - 15:45 (10:34)
      132. reboot system boot 4.15.0-44-generi Tue Jan 29 04:36 - 15:45 (11:09)
      133. reboot system boot 4.15.0-44-generi Tue Jan 29 03:48 - 15:45 (11:56)
      134. reboot system boot 4.15.0-44-generi Tue Jan 29 03:08 - 15:45 (12:37)
      135. reboot system boot 4.15.0-44-generi Tue Jan 29 02:19 - 15:45 (13:26)
      136. reboot system boot 4.15.0-44-generi Tue Jan 29 00:18 - 15:45 (15:27)
      137. reboot system boot 4.15.0-44-generi Mon Jan 28 23:45 - 15:45 (15:59)
      138. reboot system boot 4.15.0-43-generi Mon Jan 28 20:49 - 15:45 (18:56)
      139. reboot system boot 4.15.0-43-generi Mon Jan 28 19:54 - 15:45 (19:51)
      140. reboot system boot 4.15.0-43-generi Mon Jan 28 19:21 - 15:45 (20:23)
      141. reboot system boot 4.15.0-43-generi Mon Jan 28 17:14 - 15:45 (22:31)
      142. reboot system boot 4.15.0-43-generi Mon Jan 28 14:03 - 15:45 (1+01:42)
      143. reboot system boot 4.15.0-43-generi Mon Jan 28 13:33 - 15:45 (1+02:11)
      144. nina pts/0 192.168.1.222 Mon Jan 28 10:54 - 11:04 (00:10)
      145. reboot system boot 4.15.0-43-generi Mon Jan 28 10:53 - 15:45 (1+04:51)
      146. nina pts/0 192.168.1.222 Mon Jan 28 10:42 - 10:53 (00:10)
      147. reboot system boot 4.15.0-43-generi Mon Jan 28 10:39 - 10:53 (00:13)
      148. nina pts/0 192.168.1.222 Mon Jan 28 10:35 - crash (00:03)
      149. reboot system boot 4.15.0-43-generi Mon Jan 28 05:40 - 10:53 (05:12)
      150. reboot system boot 4.15.0-43-generi Mon Jan 28 03:25 - 10:53 (07:27)
      151. ... etc....


      Given this line:



      09. reboot system boot 4.15.0-44-generi Wed Jan 30 11:34 - 11:54 (00:20)


      My understanding is that the line above is saying that the system started up at 11:34, was up for 20 minutes, and then was shut down at 11:54.



      What I don't understand is that given multiple lines that repeat with the same shut down time:



      09. reboot system boot 4.15.0-44-generi Wed Jan 30 11:34 - 11:54 (00:20)
      10. reboot system boot 4.15.0-44-generi Wed Jan 30 11:23 - 11:54 (00:31)
      11. reboot system boot 4.15.0-44-generi Wed Jan 30 11:08 - 11:54 (00:45)
      12. reboot system boot 4.15.0-44-generi Wed Jan 30 10:58 - 11:54 (00:55)
      13. reboot system boot 4.15.0-44-generi Wed Jan 30 10:50 - 11:54 (01:04)


      Line 10 says the computer started up at 11:23, line 11 says the computer was started at 11:08, line 12 says 10:58, and line 13 says 10:50... but all of them say that the shut down time was 11:54.



      Instead, I would expect each shut down time to have ended before the proceeding start up. Something more like this:



      09. reboot system boot 4.15.0-44-generi Wed Jan 30 11:34 - 11:54 (00:20)
      10. reboot system boot 4.15.0-44-generi Wed Jan 30 11:23 - 11:33 (00:10)
      11. reboot system boot 4.15.0-44-generi Wed Jan 30 11:08 - 11:22 (00:14)
      12. reboot system boot 4.15.0-44-generi Wed Jan 30 10:58 - 11:07 (00:09)
      13. reboot system boot 4.15.0-44-generi Wed Jan 30 10:50 - 11:57 (00:07)


      Should I assume that there were un-recorded shutdowns between each of those periods (not just the 11:54 one?), OR should I assume that there were not actual separate start ups at each of those times, and the server was on for the whole time?



      Are there other log files to correlate the log of start up and shut down events?







      last






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      share|improve this question













      share|improve this question




      share|improve this question








      edited Jan 31 at 19:31









      Rui F Ribeiro

      40.3k1479137




      40.3k1479137










      asked Jan 30 at 21:05









      ninapavlichninapavlich

      1011




      1011




















          1 Answer
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          I found a little more information that helps indicate what's going on. It turns out that the "last" command doesn't output shutdowns or run level changes by default. (A run level of 0 is a shut down, and others indicate the system is running. Level 5 appears to be the normal run level.)



          When I add the '-x' flag, now I'm seeing the following output:



          01. nina @nina -xms-dev:~$ last -x
          02. nina pts/0 192.168.2.1 Wed Jan 30 13:12 still logged in
          03. runlevel (to lvl 5) 4.15.0-44-generi Wed Jan 30 13:09 still running
          04. reboot system boot 4.15.0-44-generi Wed Jan 30 13:09 still running
          05. runlevel (to lvl 5) 4.15.0-44-generi Wed Jan 30 12:59 - 13:09 (00:10)
          06. reboot system boot 4.15.0-44-generi Wed Jan 30 12:59 still running
          07. runlevel (to lvl 5) 4.15.0-44-generi Wed Jan 30 12:50 - 12:59 (00:08)
          08. reboot system boot 4.15.0-44-generi Wed Jan 30 12:50 still running
          09. runlevel (to lvl 5) 4.15.0-44-generi Wed Jan 30 12:33 - 12:50 (00:17)
          10. reboot system boot 4.15.0-44-generi Wed Jan 30 12:32 still running
          11. nina pts/0 192.168.2.1 Wed Jan 30 12:09 - crash (00:23)
          12. runlevel (to lvl 5) 4.15.0-44-generi Wed Jan 30 12:09 - 12:33 (00:23)
          13. reboot system boot 4.15.0-44-generi Wed Jan 30 12:09 still running
          14. nina pts/0 192.168.2.1 Wed Jan 30 11:59 - crash (00:09)
          15. runlevel (to lvl 5) 4.15.0-44-generi Wed Jan 30 11:55 - 12:09 (00:13)
          16. reboot system boot 4.15.0-44-generi Wed Jan 30 11:55 still running
          17. shutdown system down 4.15.0-44-generi Wed Jan 30 11:54 - 11:55 (00:00)
          18. nina pts/0 192.168.2.1 Wed Jan 30 11:48 - 11:54 (00:06)
          19. runlevel (to lvl 5) 4.15.0-44-generi Wed Jan 30 11:47 - 11:54 (00:06)
          20. reboot system boot 4.15.0-44-generi Wed Jan 30 11:47 - 11:54 (00:07)
          21. nina pts/0 192.168.2.1 Wed Jan 30 11:45 - crash (00:01)
          22. runlevel (to lvl 5) 4.15.0-44-generi Wed Jan 30 11:34 - 11:47 (00:13)
          23. reboot system boot 4.15.0-44-generi Wed Jan 30 11:34 - 11:54 (00:20)
          24. runlevel (to lvl 5) 4.15.0-44-generi Wed Jan 30 11:23 - 11:34 (00:10)
          25. reboot system boot 4.15.0-44-generi Wed Jan 30 11:23 - 11:54 (00:31)
          26. runlevel (to lvl 5) 4.15.0-44-generi Wed Jan 30 11:09 - 11:23 (00:14)
          27. reboot system boot 4.15.0-44-generi Wed Jan 30 11:08 - 11:54 (00:45)
          28. runlevel (to lvl 5) 4.15.0-44-generi Wed Jan 30 10:59 - 11:09 (00:10)
          29. reboot system boot 4.15.0-44-generi Wed Jan 30 10:58 - 11:54 (00:55)
          30. runlevel (to lvl 5) 4.15.0-44-generi Wed Jan 30 10:50 - 10:59 (00:08)
          31. reboot system boot 4.15.0-44-generi Wed Jan 30 10:50 - 11:54 (01:04)
          32. runlevel (to lvl 5) 4.15.0-44-generi Wed Jan 30 10:32 - 10:50 (00:18)
          33. reboot system boot 4.15.0-44-generi Wed Jan 30 10:31 - 11:54 (01:23)
          34. runlevel (to lvl 5) 4.15.0-44-generi Wed Jan 30 10:18 - 10:32 (00:13)


          The reboot commands are the same, and have the odd data, but the runlevel indicators are closer to the output I would expect:



           19. runlevel (to lvl 5) 4.15.0-44-generi Wed Jan 30 11:47 - 11:54 (00:06)
          20. reboot system boot 4.15.0-44-generi Wed Jan 30 11:47 - 11:54 (00:07)
          21. nina pts/0 192.168.2.1 Wed Jan 30 11:45 - crash (00:01)
          > 22. runlevel (to lvl 5) 4.15.0-44-generi Wed Jan 30 11:34 - 11:47 (00:13)
          23. reboot system boot 4.15.0-44-generi Wed Jan 30 11:34 - 11:54 (00:20)
          > 24. runlevel (to lvl 5) 4.15.0-44-generi Wed Jan 30 11:23 - 11:34 (00:10)
          25. reboot system boot 4.15.0-44-generi Wed Jan 30 11:23 - 11:54 (00:31)
          > 26. runlevel (to lvl 5) 4.15.0-44-generi Wed Jan 30 11:09 - 11:23 (00:14)
          27. reboot system boot 4.15.0-44-generi Wed Jan 30 11:08 - 11:54 (00:45)
          > 28. runlevel (to lvl 5) 4.15.0-44-generi Wed Jan 30 10:59 - 11:09 (00:10)
          29. reboot system boot 4.15.0-44-generi Wed Jan 30 10:58 - 11:54 (00:55)
          > 30. runlevel (to lvl 5) 4.15.0-44-generi Wed Jan 30 10:50 - 10:59 (00:08)
          31. reboot system boot 4.15.0-44-generi Wed Jan 30 10:50 - 11:54 (01:04)


          It looks like if the server is shutting down for some unknown reason, the runlevel is more reliable than the reboot information alone.






          share|improve this answer






















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            I found a little more information that helps indicate what's going on. It turns out that the "last" command doesn't output shutdowns or run level changes by default. (A run level of 0 is a shut down, and others indicate the system is running. Level 5 appears to be the normal run level.)



            When I add the '-x' flag, now I'm seeing the following output:



            01. nina @nina -xms-dev:~$ last -x
            02. nina pts/0 192.168.2.1 Wed Jan 30 13:12 still logged in
            03. runlevel (to lvl 5) 4.15.0-44-generi Wed Jan 30 13:09 still running
            04. reboot system boot 4.15.0-44-generi Wed Jan 30 13:09 still running
            05. runlevel (to lvl 5) 4.15.0-44-generi Wed Jan 30 12:59 - 13:09 (00:10)
            06. reboot system boot 4.15.0-44-generi Wed Jan 30 12:59 still running
            07. runlevel (to lvl 5) 4.15.0-44-generi Wed Jan 30 12:50 - 12:59 (00:08)
            08. reboot system boot 4.15.0-44-generi Wed Jan 30 12:50 still running
            09. runlevel (to lvl 5) 4.15.0-44-generi Wed Jan 30 12:33 - 12:50 (00:17)
            10. reboot system boot 4.15.0-44-generi Wed Jan 30 12:32 still running
            11. nina pts/0 192.168.2.1 Wed Jan 30 12:09 - crash (00:23)
            12. runlevel (to lvl 5) 4.15.0-44-generi Wed Jan 30 12:09 - 12:33 (00:23)
            13. reboot system boot 4.15.0-44-generi Wed Jan 30 12:09 still running
            14. nina pts/0 192.168.2.1 Wed Jan 30 11:59 - crash (00:09)
            15. runlevel (to lvl 5) 4.15.0-44-generi Wed Jan 30 11:55 - 12:09 (00:13)
            16. reboot system boot 4.15.0-44-generi Wed Jan 30 11:55 still running
            17. shutdown system down 4.15.0-44-generi Wed Jan 30 11:54 - 11:55 (00:00)
            18. nina pts/0 192.168.2.1 Wed Jan 30 11:48 - 11:54 (00:06)
            19. runlevel (to lvl 5) 4.15.0-44-generi Wed Jan 30 11:47 - 11:54 (00:06)
            20. reboot system boot 4.15.0-44-generi Wed Jan 30 11:47 - 11:54 (00:07)
            21. nina pts/0 192.168.2.1 Wed Jan 30 11:45 - crash (00:01)
            22. runlevel (to lvl 5) 4.15.0-44-generi Wed Jan 30 11:34 - 11:47 (00:13)
            23. reboot system boot 4.15.0-44-generi Wed Jan 30 11:34 - 11:54 (00:20)
            24. runlevel (to lvl 5) 4.15.0-44-generi Wed Jan 30 11:23 - 11:34 (00:10)
            25. reboot system boot 4.15.0-44-generi Wed Jan 30 11:23 - 11:54 (00:31)
            26. runlevel (to lvl 5) 4.15.0-44-generi Wed Jan 30 11:09 - 11:23 (00:14)
            27. reboot system boot 4.15.0-44-generi Wed Jan 30 11:08 - 11:54 (00:45)
            28. runlevel (to lvl 5) 4.15.0-44-generi Wed Jan 30 10:59 - 11:09 (00:10)
            29. reboot system boot 4.15.0-44-generi Wed Jan 30 10:58 - 11:54 (00:55)
            30. runlevel (to lvl 5) 4.15.0-44-generi Wed Jan 30 10:50 - 10:59 (00:08)
            31. reboot system boot 4.15.0-44-generi Wed Jan 30 10:50 - 11:54 (01:04)
            32. runlevel (to lvl 5) 4.15.0-44-generi Wed Jan 30 10:32 - 10:50 (00:18)
            33. reboot system boot 4.15.0-44-generi Wed Jan 30 10:31 - 11:54 (01:23)
            34. runlevel (to lvl 5) 4.15.0-44-generi Wed Jan 30 10:18 - 10:32 (00:13)


            The reboot commands are the same, and have the odd data, but the runlevel indicators are closer to the output I would expect:



             19. runlevel (to lvl 5) 4.15.0-44-generi Wed Jan 30 11:47 - 11:54 (00:06)
            20. reboot system boot 4.15.0-44-generi Wed Jan 30 11:47 - 11:54 (00:07)
            21. nina pts/0 192.168.2.1 Wed Jan 30 11:45 - crash (00:01)
            > 22. runlevel (to lvl 5) 4.15.0-44-generi Wed Jan 30 11:34 - 11:47 (00:13)
            23. reboot system boot 4.15.0-44-generi Wed Jan 30 11:34 - 11:54 (00:20)
            > 24. runlevel (to lvl 5) 4.15.0-44-generi Wed Jan 30 11:23 - 11:34 (00:10)
            25. reboot system boot 4.15.0-44-generi Wed Jan 30 11:23 - 11:54 (00:31)
            > 26. runlevel (to lvl 5) 4.15.0-44-generi Wed Jan 30 11:09 - 11:23 (00:14)
            27. reboot system boot 4.15.0-44-generi Wed Jan 30 11:08 - 11:54 (00:45)
            > 28. runlevel (to lvl 5) 4.15.0-44-generi Wed Jan 30 10:59 - 11:09 (00:10)
            29. reboot system boot 4.15.0-44-generi Wed Jan 30 10:58 - 11:54 (00:55)
            > 30. runlevel (to lvl 5) 4.15.0-44-generi Wed Jan 30 10:50 - 10:59 (00:08)
            31. reboot system boot 4.15.0-44-generi Wed Jan 30 10:50 - 11:54 (01:04)


            It looks like if the server is shutting down for some unknown reason, the runlevel is more reliable than the reboot information alone.






            share|improve this answer



























              0














              I found a little more information that helps indicate what's going on. It turns out that the "last" command doesn't output shutdowns or run level changes by default. (A run level of 0 is a shut down, and others indicate the system is running. Level 5 appears to be the normal run level.)



              When I add the '-x' flag, now I'm seeing the following output:



              01. nina @nina -xms-dev:~$ last -x
              02. nina pts/0 192.168.2.1 Wed Jan 30 13:12 still logged in
              03. runlevel (to lvl 5) 4.15.0-44-generi Wed Jan 30 13:09 still running
              04. reboot system boot 4.15.0-44-generi Wed Jan 30 13:09 still running
              05. runlevel (to lvl 5) 4.15.0-44-generi Wed Jan 30 12:59 - 13:09 (00:10)
              06. reboot system boot 4.15.0-44-generi Wed Jan 30 12:59 still running
              07. runlevel (to lvl 5) 4.15.0-44-generi Wed Jan 30 12:50 - 12:59 (00:08)
              08. reboot system boot 4.15.0-44-generi Wed Jan 30 12:50 still running
              09. runlevel (to lvl 5) 4.15.0-44-generi Wed Jan 30 12:33 - 12:50 (00:17)
              10. reboot system boot 4.15.0-44-generi Wed Jan 30 12:32 still running
              11. nina pts/0 192.168.2.1 Wed Jan 30 12:09 - crash (00:23)
              12. runlevel (to lvl 5) 4.15.0-44-generi Wed Jan 30 12:09 - 12:33 (00:23)
              13. reboot system boot 4.15.0-44-generi Wed Jan 30 12:09 still running
              14. nina pts/0 192.168.2.1 Wed Jan 30 11:59 - crash (00:09)
              15. runlevel (to lvl 5) 4.15.0-44-generi Wed Jan 30 11:55 - 12:09 (00:13)
              16. reboot system boot 4.15.0-44-generi Wed Jan 30 11:55 still running
              17. shutdown system down 4.15.0-44-generi Wed Jan 30 11:54 - 11:55 (00:00)
              18. nina pts/0 192.168.2.1 Wed Jan 30 11:48 - 11:54 (00:06)
              19. runlevel (to lvl 5) 4.15.0-44-generi Wed Jan 30 11:47 - 11:54 (00:06)
              20. reboot system boot 4.15.0-44-generi Wed Jan 30 11:47 - 11:54 (00:07)
              21. nina pts/0 192.168.2.1 Wed Jan 30 11:45 - crash (00:01)
              22. runlevel (to lvl 5) 4.15.0-44-generi Wed Jan 30 11:34 - 11:47 (00:13)
              23. reboot system boot 4.15.0-44-generi Wed Jan 30 11:34 - 11:54 (00:20)
              24. runlevel (to lvl 5) 4.15.0-44-generi Wed Jan 30 11:23 - 11:34 (00:10)
              25. reboot system boot 4.15.0-44-generi Wed Jan 30 11:23 - 11:54 (00:31)
              26. runlevel (to lvl 5) 4.15.0-44-generi Wed Jan 30 11:09 - 11:23 (00:14)
              27. reboot system boot 4.15.0-44-generi Wed Jan 30 11:08 - 11:54 (00:45)
              28. runlevel (to lvl 5) 4.15.0-44-generi Wed Jan 30 10:59 - 11:09 (00:10)
              29. reboot system boot 4.15.0-44-generi Wed Jan 30 10:58 - 11:54 (00:55)
              30. runlevel (to lvl 5) 4.15.0-44-generi Wed Jan 30 10:50 - 10:59 (00:08)
              31. reboot system boot 4.15.0-44-generi Wed Jan 30 10:50 - 11:54 (01:04)
              32. runlevel (to lvl 5) 4.15.0-44-generi Wed Jan 30 10:32 - 10:50 (00:18)
              33. reboot system boot 4.15.0-44-generi Wed Jan 30 10:31 - 11:54 (01:23)
              34. runlevel (to lvl 5) 4.15.0-44-generi Wed Jan 30 10:18 - 10:32 (00:13)


              The reboot commands are the same, and have the odd data, but the runlevel indicators are closer to the output I would expect:



               19. runlevel (to lvl 5) 4.15.0-44-generi Wed Jan 30 11:47 - 11:54 (00:06)
              20. reboot system boot 4.15.0-44-generi Wed Jan 30 11:47 - 11:54 (00:07)
              21. nina pts/0 192.168.2.1 Wed Jan 30 11:45 - crash (00:01)
              > 22. runlevel (to lvl 5) 4.15.0-44-generi Wed Jan 30 11:34 - 11:47 (00:13)
              23. reboot system boot 4.15.0-44-generi Wed Jan 30 11:34 - 11:54 (00:20)
              > 24. runlevel (to lvl 5) 4.15.0-44-generi Wed Jan 30 11:23 - 11:34 (00:10)
              25. reboot system boot 4.15.0-44-generi Wed Jan 30 11:23 - 11:54 (00:31)
              > 26. runlevel (to lvl 5) 4.15.0-44-generi Wed Jan 30 11:09 - 11:23 (00:14)
              27. reboot system boot 4.15.0-44-generi Wed Jan 30 11:08 - 11:54 (00:45)
              > 28. runlevel (to lvl 5) 4.15.0-44-generi Wed Jan 30 10:59 - 11:09 (00:10)
              29. reboot system boot 4.15.0-44-generi Wed Jan 30 10:58 - 11:54 (00:55)
              > 30. runlevel (to lvl 5) 4.15.0-44-generi Wed Jan 30 10:50 - 10:59 (00:08)
              31. reboot system boot 4.15.0-44-generi Wed Jan 30 10:50 - 11:54 (01:04)


              It looks like if the server is shutting down for some unknown reason, the runlevel is more reliable than the reboot information alone.






              share|improve this answer

























                0












                0








                0







                I found a little more information that helps indicate what's going on. It turns out that the "last" command doesn't output shutdowns or run level changes by default. (A run level of 0 is a shut down, and others indicate the system is running. Level 5 appears to be the normal run level.)



                When I add the '-x' flag, now I'm seeing the following output:



                01. nina @nina -xms-dev:~$ last -x
                02. nina pts/0 192.168.2.1 Wed Jan 30 13:12 still logged in
                03. runlevel (to lvl 5) 4.15.0-44-generi Wed Jan 30 13:09 still running
                04. reboot system boot 4.15.0-44-generi Wed Jan 30 13:09 still running
                05. runlevel (to lvl 5) 4.15.0-44-generi Wed Jan 30 12:59 - 13:09 (00:10)
                06. reboot system boot 4.15.0-44-generi Wed Jan 30 12:59 still running
                07. runlevel (to lvl 5) 4.15.0-44-generi Wed Jan 30 12:50 - 12:59 (00:08)
                08. reboot system boot 4.15.0-44-generi Wed Jan 30 12:50 still running
                09. runlevel (to lvl 5) 4.15.0-44-generi Wed Jan 30 12:33 - 12:50 (00:17)
                10. reboot system boot 4.15.0-44-generi Wed Jan 30 12:32 still running
                11. nina pts/0 192.168.2.1 Wed Jan 30 12:09 - crash (00:23)
                12. runlevel (to lvl 5) 4.15.0-44-generi Wed Jan 30 12:09 - 12:33 (00:23)
                13. reboot system boot 4.15.0-44-generi Wed Jan 30 12:09 still running
                14. nina pts/0 192.168.2.1 Wed Jan 30 11:59 - crash (00:09)
                15. runlevel (to lvl 5) 4.15.0-44-generi Wed Jan 30 11:55 - 12:09 (00:13)
                16. reboot system boot 4.15.0-44-generi Wed Jan 30 11:55 still running
                17. shutdown system down 4.15.0-44-generi Wed Jan 30 11:54 - 11:55 (00:00)
                18. nina pts/0 192.168.2.1 Wed Jan 30 11:48 - 11:54 (00:06)
                19. runlevel (to lvl 5) 4.15.0-44-generi Wed Jan 30 11:47 - 11:54 (00:06)
                20. reboot system boot 4.15.0-44-generi Wed Jan 30 11:47 - 11:54 (00:07)
                21. nina pts/0 192.168.2.1 Wed Jan 30 11:45 - crash (00:01)
                22. runlevel (to lvl 5) 4.15.0-44-generi Wed Jan 30 11:34 - 11:47 (00:13)
                23. reboot system boot 4.15.0-44-generi Wed Jan 30 11:34 - 11:54 (00:20)
                24. runlevel (to lvl 5) 4.15.0-44-generi Wed Jan 30 11:23 - 11:34 (00:10)
                25. reboot system boot 4.15.0-44-generi Wed Jan 30 11:23 - 11:54 (00:31)
                26. runlevel (to lvl 5) 4.15.0-44-generi Wed Jan 30 11:09 - 11:23 (00:14)
                27. reboot system boot 4.15.0-44-generi Wed Jan 30 11:08 - 11:54 (00:45)
                28. runlevel (to lvl 5) 4.15.0-44-generi Wed Jan 30 10:59 - 11:09 (00:10)
                29. reboot system boot 4.15.0-44-generi Wed Jan 30 10:58 - 11:54 (00:55)
                30. runlevel (to lvl 5) 4.15.0-44-generi Wed Jan 30 10:50 - 10:59 (00:08)
                31. reboot system boot 4.15.0-44-generi Wed Jan 30 10:50 - 11:54 (01:04)
                32. runlevel (to lvl 5) 4.15.0-44-generi Wed Jan 30 10:32 - 10:50 (00:18)
                33. reboot system boot 4.15.0-44-generi Wed Jan 30 10:31 - 11:54 (01:23)
                34. runlevel (to lvl 5) 4.15.0-44-generi Wed Jan 30 10:18 - 10:32 (00:13)


                The reboot commands are the same, and have the odd data, but the runlevel indicators are closer to the output I would expect:



                 19. runlevel (to lvl 5) 4.15.0-44-generi Wed Jan 30 11:47 - 11:54 (00:06)
                20. reboot system boot 4.15.0-44-generi Wed Jan 30 11:47 - 11:54 (00:07)
                21. nina pts/0 192.168.2.1 Wed Jan 30 11:45 - crash (00:01)
                > 22. runlevel (to lvl 5) 4.15.0-44-generi Wed Jan 30 11:34 - 11:47 (00:13)
                23. reboot system boot 4.15.0-44-generi Wed Jan 30 11:34 - 11:54 (00:20)
                > 24. runlevel (to lvl 5) 4.15.0-44-generi Wed Jan 30 11:23 - 11:34 (00:10)
                25. reboot system boot 4.15.0-44-generi Wed Jan 30 11:23 - 11:54 (00:31)
                > 26. runlevel (to lvl 5) 4.15.0-44-generi Wed Jan 30 11:09 - 11:23 (00:14)
                27. reboot system boot 4.15.0-44-generi Wed Jan 30 11:08 - 11:54 (00:45)
                > 28. runlevel (to lvl 5) 4.15.0-44-generi Wed Jan 30 10:59 - 11:09 (00:10)
                29. reboot system boot 4.15.0-44-generi Wed Jan 30 10:58 - 11:54 (00:55)
                > 30. runlevel (to lvl 5) 4.15.0-44-generi Wed Jan 30 10:50 - 10:59 (00:08)
                31. reboot system boot 4.15.0-44-generi Wed Jan 30 10:50 - 11:54 (01:04)


                It looks like if the server is shutting down for some unknown reason, the runlevel is more reliable than the reboot information alone.






                share|improve this answer













                I found a little more information that helps indicate what's going on. It turns out that the "last" command doesn't output shutdowns or run level changes by default. (A run level of 0 is a shut down, and others indicate the system is running. Level 5 appears to be the normal run level.)



                When I add the '-x' flag, now I'm seeing the following output:



                01. nina @nina -xms-dev:~$ last -x
                02. nina pts/0 192.168.2.1 Wed Jan 30 13:12 still logged in
                03. runlevel (to lvl 5) 4.15.0-44-generi Wed Jan 30 13:09 still running
                04. reboot system boot 4.15.0-44-generi Wed Jan 30 13:09 still running
                05. runlevel (to lvl 5) 4.15.0-44-generi Wed Jan 30 12:59 - 13:09 (00:10)
                06. reboot system boot 4.15.0-44-generi Wed Jan 30 12:59 still running
                07. runlevel (to lvl 5) 4.15.0-44-generi Wed Jan 30 12:50 - 12:59 (00:08)
                08. reboot system boot 4.15.0-44-generi Wed Jan 30 12:50 still running
                09. runlevel (to lvl 5) 4.15.0-44-generi Wed Jan 30 12:33 - 12:50 (00:17)
                10. reboot system boot 4.15.0-44-generi Wed Jan 30 12:32 still running
                11. nina pts/0 192.168.2.1 Wed Jan 30 12:09 - crash (00:23)
                12. runlevel (to lvl 5) 4.15.0-44-generi Wed Jan 30 12:09 - 12:33 (00:23)
                13. reboot system boot 4.15.0-44-generi Wed Jan 30 12:09 still running
                14. nina pts/0 192.168.2.1 Wed Jan 30 11:59 - crash (00:09)
                15. runlevel (to lvl 5) 4.15.0-44-generi Wed Jan 30 11:55 - 12:09 (00:13)
                16. reboot system boot 4.15.0-44-generi Wed Jan 30 11:55 still running
                17. shutdown system down 4.15.0-44-generi Wed Jan 30 11:54 - 11:55 (00:00)
                18. nina pts/0 192.168.2.1 Wed Jan 30 11:48 - 11:54 (00:06)
                19. runlevel (to lvl 5) 4.15.0-44-generi Wed Jan 30 11:47 - 11:54 (00:06)
                20. reboot system boot 4.15.0-44-generi Wed Jan 30 11:47 - 11:54 (00:07)
                21. nina pts/0 192.168.2.1 Wed Jan 30 11:45 - crash (00:01)
                22. runlevel (to lvl 5) 4.15.0-44-generi Wed Jan 30 11:34 - 11:47 (00:13)
                23. reboot system boot 4.15.0-44-generi Wed Jan 30 11:34 - 11:54 (00:20)
                24. runlevel (to lvl 5) 4.15.0-44-generi Wed Jan 30 11:23 - 11:34 (00:10)
                25. reboot system boot 4.15.0-44-generi Wed Jan 30 11:23 - 11:54 (00:31)
                26. runlevel (to lvl 5) 4.15.0-44-generi Wed Jan 30 11:09 - 11:23 (00:14)
                27. reboot system boot 4.15.0-44-generi Wed Jan 30 11:08 - 11:54 (00:45)
                28. runlevel (to lvl 5) 4.15.0-44-generi Wed Jan 30 10:59 - 11:09 (00:10)
                29. reboot system boot 4.15.0-44-generi Wed Jan 30 10:58 - 11:54 (00:55)
                30. runlevel (to lvl 5) 4.15.0-44-generi Wed Jan 30 10:50 - 10:59 (00:08)
                31. reboot system boot 4.15.0-44-generi Wed Jan 30 10:50 - 11:54 (01:04)
                32. runlevel (to lvl 5) 4.15.0-44-generi Wed Jan 30 10:32 - 10:50 (00:18)
                33. reboot system boot 4.15.0-44-generi Wed Jan 30 10:31 - 11:54 (01:23)
                34. runlevel (to lvl 5) 4.15.0-44-generi Wed Jan 30 10:18 - 10:32 (00:13)


                The reboot commands are the same, and have the odd data, but the runlevel indicators are closer to the output I would expect:



                 19. runlevel (to lvl 5) 4.15.0-44-generi Wed Jan 30 11:47 - 11:54 (00:06)
                20. reboot system boot 4.15.0-44-generi Wed Jan 30 11:47 - 11:54 (00:07)
                21. nina pts/0 192.168.2.1 Wed Jan 30 11:45 - crash (00:01)
                > 22. runlevel (to lvl 5) 4.15.0-44-generi Wed Jan 30 11:34 - 11:47 (00:13)
                23. reboot system boot 4.15.0-44-generi Wed Jan 30 11:34 - 11:54 (00:20)
                > 24. runlevel (to lvl 5) 4.15.0-44-generi Wed Jan 30 11:23 - 11:34 (00:10)
                25. reboot system boot 4.15.0-44-generi Wed Jan 30 11:23 - 11:54 (00:31)
                > 26. runlevel (to lvl 5) 4.15.0-44-generi Wed Jan 30 11:09 - 11:23 (00:14)
                27. reboot system boot 4.15.0-44-generi Wed Jan 30 11:08 - 11:54 (00:45)
                > 28. runlevel (to lvl 5) 4.15.0-44-generi Wed Jan 30 10:59 - 11:09 (00:10)
                29. reboot system boot 4.15.0-44-generi Wed Jan 30 10:58 - 11:54 (00:55)
                > 30. runlevel (to lvl 5) 4.15.0-44-generi Wed Jan 30 10:50 - 10:59 (00:08)
                31. reboot system boot 4.15.0-44-generi Wed Jan 30 10:50 - 11:54 (01:04)


                It looks like if the server is shutting down for some unknown reason, the runlevel is more reliable than the reboot information alone.







                share|improve this answer












                share|improve this answer



                share|improve this answer










                answered Jan 30 at 21:36









                ninapavlichninapavlich

                1011




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