How can I write a shell script to filter the last command?
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I want to write a script for login statistics. I want to count how many times a user logged in, and then display them in ascending, or descending order, given by the end user. The problme being, i don't know how to write a script that could count how many times a user logged in. I have to use the last command.
shell grep scripting last
edited 2 days ago
Rui F Ribeiro
38.2k1475125
asked Nov 19 at 16:08
Bakos Dominik
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up vote
0
down vote
favorite
I want to write a script for login statistics. I want to count how many times a user logged in, and then display them in ascending, or descending order, given by the end user. The problme being, i don't know how to write a script that could count how many times a user logged in. I have to use the last command.
shell grep scripting last
edited 2 days ago
Rui F Ribeiro
38.2k1475125
asked Nov 19 at 16:08
Bakos Dominik
152
New contributor
Bakos Dominik is a new contributor to this site. Take care in asking for clarification, commenting, and answering.
Check out our Code of Conduct.
3
Can't you dolast $usernamefor every user, and count the lines being returned? You will have to truncate the last 2 ones though. Also, be warned that thewtmpfile only holds records for a specific timeframe.
– Panki
Nov 19 at 16:16
#!/bin/bash echo '1 - ascending, 0 - descending, please choose:' read x echo 'how many lines do you need?:' read y if [ $x -eq 1 ]; then echolast>> last.txt fi after I have the last.txt file, i need to count how many times one user logged in, then put the data in ascending/descending order. At the end, I have to display A certain amount of lines, strating from 1. Can't really figure out how to do it..
– Bakos Dominik
Nov 19 at 16:38
add a comment |
up vote
0
down vote
favorite
up vote
0
down vote
favorite
I want to write a script for login statistics. I want to count how many times a user logged in, and then display them in ascending, or descending order, given by the end user. The problme being, i don't know how to write a script that could count how many times a user logged in. I have to use the last command.
shell grep scripting last
edited 2 days ago
Rui F Ribeiro
38.2k1475125
asked Nov 19 at 16:08
Bakos Dominik
152
New contributor
Bakos Dominik is a new contributor to this site. Take care in asking for clarification, commenting, and answering.
Check out our Code of Conduct.
I want to write a script for login statistics. I want to count how many times a user logged in, and then display them in ascending, or descending order, given by the end user. The problme being, i don't know how to write a script that could count how many times a user logged in. I have to use the last command.
shell grep scripting last
shell grep scripting last
edited 2 days ago
Rui F Ribeiro
38.2k1475125
asked Nov 19 at 16:08
Bakos Dominik
152
New contributor
Bakos Dominik is a new contributor to this site. Take care in asking for clarification, commenting, and answering.
Check out our Code of Conduct.
edited 2 days ago
Rui F Ribeiro
38.2k1475125
asked Nov 19 at 16:08
Bakos Dominik
152
New contributor
Bakos Dominik is a new contributor to this site. Take care in asking for clarification, commenting, and answering.
Check out our Code of Conduct.
edited 2 days ago
Rui F Ribeiro
38.2k1475125
edited 2 days ago
Rui F Ribeiro
38.2k1475125
edited 2 days ago
Rui F Ribeiro
38.2k1475125
38.2k1475125
asked Nov 19 at 16:08
Bakos Dominik
152
New contributor
Bakos Dominik is a new contributor to this site. Take care in asking for clarification, commenting, and answering.
Check out our Code of Conduct.
asked Nov 19 at 16:08
Bakos Dominik
152
asked Nov 19 at 16:08
Bakos Dominik
152
152
New contributor
Bakos Dominik is a new contributor to this site. Take care in asking for clarification, commenting, and answering.
Check out our Code of Conduct.
New contributor
Bakos Dominik is a new contributor to this site. Take care in asking for clarification, commenting, and answering.
Check out our Code of Conduct.
Bakos Dominik is a new contributor to this site. Take care in asking for clarification, commenting, and answering.
Check out our Code of Conduct.
3
Can't you dolast $usernamefor every user, and count the lines being returned? You will have to truncate the last 2 ones though. Also, be warned that thewtmpfile only holds records for a specific timeframe.
– Panki
Nov 19 at 16:16
#!/bin/bash echo '1 - ascending, 0 - descending, please choose:' read x echo 'how many lines do you need?:' read y if [ $x -eq 1 ]; then echolast>> last.txt fi after I have the last.txt file, i need to count how many times one user logged in, then put the data in ascending/descending order. At the end, I have to display A certain amount of lines, strating from 1. Can't really figure out how to do it..
– Bakos Dominik
Nov 19 at 16:38
add a comment |
3
Can't you dolast $usernamefor every user, and count the lines being returned? You will have to truncate the last 2 ones though. Also, be warned that thewtmpfile only holds records for a specific timeframe.
– Panki
Nov 19 at 16:16
#!/bin/bash echo '1 - ascending, 0 - descending, please choose:' read x echo 'how many lines do you need?:' read y if [ $x -eq 1 ]; then echolast>> last.txt fi after I have the last.txt file, i need to count how many times one user logged in, then put the data in ascending/descending order. At the end, I have to display A certain amount of lines, strating from 1. Can't really figure out how to do it..
– Bakos Dominik
Nov 19 at 16:38
3
3
Can't you do
last $username for every user, and count the lines being returned? You will have to truncate the last 2 ones though. Also, be warned that the wtmp file only holds records for a specific timeframe.– Panki
Nov 19 at 16:16
Can't you do
last $username for every user, and count the lines being returned? You will have to truncate the last 2 ones though. Also, be warned that the wtmp file only holds records for a specific timeframe.– Panki
Nov 19 at 16:16
#!/bin/bash echo '1 - ascending, 0 - descending, please choose:' read x echo 'how many lines do you need?:' read y if [ $x -eq 1 ]; then echo
last >> last.txt fi after I have the last.txt file, i need to count how many times one user logged in, then put the data in ascending/descending order. At the end, I have to display A certain amount of lines, strating from 1. Can't really figure out how to do it..– Bakos Dominik
Nov 19 at 16:38
#!/bin/bash echo '1 - ascending, 0 - descending, please choose:' read x echo 'how many lines do you need?:' read y if [ $x -eq 1 ]; then echo
last >> last.txt fi after I have the last.txt file, i need to count how many times one user logged in, then put the data in ascending/descending order. At the end, I have to display A certain amount of lines, strating from 1. Can't really figure out how to do it..– Bakos Dominik
Nov 19 at 16:38
add a comment |
1 Answer
1
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votes
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0
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#!/bin/bash
userlist=$(cat /etc/passwd | cut -d : -f 1)
for user in $userlist; do
timesloggedin=$(last $user | head -n -2 | wc -l);
echo $timesloggedin $user;
done | sort -r
This gets the name of ALL the users on the system, including daemon accounts etc.
If you don't want that, supply userlist with a list of your usernames.
To get the output in ascending order, drop the -r flag to sort.
answered Nov 20 at 8:54
Panki
42719
add a comment |
1 Answer
1
active
oldest
votes
1 Answer
1
active
oldest
votes
active
oldest
votes
active
oldest
votes
up vote
0
down vote
accepted
#!/bin/bash
userlist=$(cat /etc/passwd | cut -d : -f 1)
for user in $userlist; do
timesloggedin=$(last $user | head -n -2 | wc -l);
echo $timesloggedin $user;
done | sort -r
This gets the name of ALL the users on the system, including daemon accounts etc.
If you don't want that, supply userlist with a list of your usernames.
To get the output in ascending order, drop the -r flag to sort.
answered Nov 20 at 8:54
Panki
42719
add a comment |
up vote
0
down vote
accepted
#!/bin/bash
userlist=$(cat /etc/passwd | cut -d : -f 1)
for user in $userlist; do
timesloggedin=$(last $user | head -n -2 | wc -l);
echo $timesloggedin $user;
done | sort -r
This gets the name of ALL the users on the system, including daemon accounts etc.
If you don't want that, supply userlist with a list of your usernames.
To get the output in ascending order, drop the -r flag to sort.
answered Nov 20 at 8:54
Panki
42719
add a comment |
up vote
0
down vote
accepted
up vote
0
down vote
accepted
#!/bin/bash
userlist=$(cat /etc/passwd | cut -d : -f 1)
for user in $userlist; do
timesloggedin=$(last $user | head -n -2 | wc -l);
echo $timesloggedin $user;
done | sort -r
This gets the name of ALL the users on the system, including daemon accounts etc.
If you don't want that, supply userlist with a list of your usernames.
To get the output in ascending order, drop the -r flag to sort.
answered Nov 20 at 8:54
Panki
42719
#!/bin/bash
userlist=$(cat /etc/passwd | cut -d : -f 1)
for user in $userlist; do
timesloggedin=$(last $user | head -n -2 | wc -l);
echo $timesloggedin $user;
done | sort -r
This gets the name of ALL the users on the system, including daemon accounts etc.
If you don't want that, supply userlist with a list of your usernames.
To get the output in ascending order, drop the -r flag to sort.
answered Nov 20 at 8:54
Panki
42719
answered Nov 20 at 8:54
Panki
42719
answered Nov 20 at 8:54
Panki
42719
answered Nov 20 at 8:54
Panki
42719
42719
add a comment |
add a comment |
Bakos Dominik is a new contributor. Be nice, and check out our Code of Conduct.
Bakos Dominik is a new contributor. Be nice, and check out our Code of Conduct.
Bakos Dominik is a new contributor. Be nice, and check out our Code of Conduct.
Bakos Dominik is a new contributor. Be nice, and check out our Code of Conduct.
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3
Can't you do
last $usernamefor every user, and count the lines being returned? You will have to truncate the last 2 ones though. Also, be warned that thewtmpfile only holds records for a specific timeframe.– Panki
Nov 19 at 16:16
#!/bin/bash echo '1 - ascending, 0 - descending, please choose:' read x echo 'how many lines do you need?:' read y if [ $x -eq 1 ]; then echo
last>> last.txt fi after I have the last.txt file, i need to count how many times one user logged in, then put the data in ascending/descending order. At the end, I have to display A certain amount of lines, strating from 1. Can't really figure out how to do it..– Bakos Dominik
Nov 19 at 16:38