How do I get the PID of my main process (and not one of its workers)?
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I'm using CentOS 7. I'm trying to write a script to start and stop a puma process but I can't figure out how to get the "master" PID, if taht is even the right term. In the below command
[rails@server myproject_production]$ ps aux | grep puma
rails 15767 0.0 1.2 437904 13612 ? Sl 17:20 0:00 puma 3.11.4 (tcp://0.0.0.0:3000,unix:///home/rails/myproject_production/shared/sockets/puma.sock) [myproject_production]
rails 15779 0.6 7.6 1061248 80688 ? Sl 17:20 0:05 puma: cluster worker 1: 15767 [myproject_production]
rails 15781 0.6 7.7 1061248 80876 ? Sl 17:20 0:05 puma: cluster worker 2: 15767 [myproject_production]
rails 15785 0.6 7.4 1061964 78488 ? Sl 17:20 0:05 puma: cluster worker 3: 15767 [myproject_production]
rails 15880 0.7 7.4 1059612 78592 ? Sl 17:22 0:05 puma: cluster worker 0: 15767 [myproject_production]
rails 17106 0.0 0.1 112612 1064 pts/0 S+ 17:33 0:00 grep --color=auto puma
The master PID is "15767". If I kill that all the other puma processes will die. How do I write a command to get taht into a script variable?
shell-script centos process ps
asked May 9 at 21:40
Dave
363827
add a comment |Â
up vote
2
down vote
favorite
I'm using CentOS 7. I'm trying to write a script to start and stop a puma process but I can't figure out how to get the "master" PID, if taht is even the right term. In the below command
[rails@server myproject_production]$ ps aux | grep puma
rails 15767 0.0 1.2 437904 13612 ? Sl 17:20 0:00 puma 3.11.4 (tcp://0.0.0.0:3000,unix:///home/rails/myproject_production/shared/sockets/puma.sock) [myproject_production]
rails 15779 0.6 7.6 1061248 80688 ? Sl 17:20 0:05 puma: cluster worker 1: 15767 [myproject_production]
rails 15781 0.6 7.7 1061248 80876 ? Sl 17:20 0:05 puma: cluster worker 2: 15767 [myproject_production]
rails 15785 0.6 7.4 1061964 78488 ? Sl 17:20 0:05 puma: cluster worker 3: 15767 [myproject_production]
rails 15880 0.7 7.4 1059612 78592 ? Sl 17:22 0:05 puma: cluster worker 0: 15767 [myproject_production]
rails 17106 0.0 0.1 112612 1064 pts/0 S+ 17:33 0:00 grep --color=auto puma
The master PID is "15767". If I kill that all the other puma processes will die. How do I write a command to get taht into a script variable?
shell-script centos process ps
asked May 9 at 21:40
Dave
363827
I naively assume you can grep for more text from that line ofps, why can't you?
– ajeh
May 9 at 21:53
add a comment |Â
up vote
2
down vote
favorite
up vote
2
down vote
favorite
I'm using CentOS 7. I'm trying to write a script to start and stop a puma process but I can't figure out how to get the "master" PID, if taht is even the right term. In the below command
[rails@server myproject_production]$ ps aux | grep puma
rails 15767 0.0 1.2 437904 13612 ? Sl 17:20 0:00 puma 3.11.4 (tcp://0.0.0.0:3000,unix:///home/rails/myproject_production/shared/sockets/puma.sock) [myproject_production]
rails 15779 0.6 7.6 1061248 80688 ? Sl 17:20 0:05 puma: cluster worker 1: 15767 [myproject_production]
rails 15781 0.6 7.7 1061248 80876 ? Sl 17:20 0:05 puma: cluster worker 2: 15767 [myproject_production]
rails 15785 0.6 7.4 1061964 78488 ? Sl 17:20 0:05 puma: cluster worker 3: 15767 [myproject_production]
rails 15880 0.7 7.4 1059612 78592 ? Sl 17:22 0:05 puma: cluster worker 0: 15767 [myproject_production]
rails 17106 0.0 0.1 112612 1064 pts/0 S+ 17:33 0:00 grep --color=auto puma
The master PID is "15767". If I kill that all the other puma processes will die. How do I write a command to get taht into a script variable?
shell-script centos process ps
asked May 9 at 21:40
Dave
363827
I'm using CentOS 7. I'm trying to write a script to start and stop a puma process but I can't figure out how to get the "master" PID, if taht is even the right term. In the below command
[rails@server myproject_production]$ ps aux | grep puma
rails 15767 0.0 1.2 437904 13612 ? Sl 17:20 0:00 puma 3.11.4 (tcp://0.0.0.0:3000,unix:///home/rails/myproject_production/shared/sockets/puma.sock) [myproject_production]
rails 15779 0.6 7.6 1061248 80688 ? Sl 17:20 0:05 puma: cluster worker 1: 15767 [myproject_production]
rails 15781 0.6 7.7 1061248 80876 ? Sl 17:20 0:05 puma: cluster worker 2: 15767 [myproject_production]
rails 15785 0.6 7.4 1061964 78488 ? Sl 17:20 0:05 puma: cluster worker 3: 15767 [myproject_production]
rails 15880 0.7 7.4 1059612 78592 ? Sl 17:22 0:05 puma: cluster worker 0: 15767 [myproject_production]
rails 17106 0.0 0.1 112612 1064 pts/0 S+ 17:33 0:00 grep --color=auto puma
The master PID is "15767". If I kill that all the other puma processes will die. How do I write a command to get taht into a script variable?
shell-script centos process ps
asked May 9 at 21:40
Dave
363827
asked May 9 at 21:40
Dave
363827
asked May 9 at 21:40
Dave
363827
asked May 9 at 21:40
Dave
363827
363827
I naively assume you can grep for more text from that line ofps, why can't you?
– ajeh
May 9 at 21:53
add a comment |Â
I naively assume you can grep for more text from that line ofps, why can't you?
– ajeh
May 9 at 21:53
I naively assume you can grep for more text from that line of
ps, why can't you?– ajeh
May 9 at 21:53
I naively assume you can grep for more text from that line of
ps, why can't you?– ajeh
May 9 at 21:53
add a comment |Â
1 Answer
1
active
oldest
votes
up vote
4
down vote
accepted
Use pgrep instead of filtering the output from ps. I think in your case, pgrep -f '^([^ ]*/)?puma ' will match the right process, but experiment a bit to make sure that you're getting what you want and no more.
Once you're satisfied that pgrep is finding the process you want to kill, replace pgrep by pkill.
answered May 9 at 22:04
Gilles
503k1189951522
Great solution. Thanks!
– Dave
May 9 at 22:52
add a comment |Â
1 Answer
1
active
oldest
votes
1 Answer
1
active
oldest
votes
active
oldest
votes
active
oldest
votes
up vote
4
down vote
accepted
Use pgrep instead of filtering the output from ps. I think in your case, pgrep -f '^([^ ]*/)?puma ' will match the right process, but experiment a bit to make sure that you're getting what you want and no more.
Once you're satisfied that pgrep is finding the process you want to kill, replace pgrep by pkill.
answered May 9 at 22:04
Gilles
503k1189951522
Great solution. Thanks!
– Dave
May 9 at 22:52
add a comment |Â
up vote
4
down vote
accepted
Use pgrep instead of filtering the output from ps. I think in your case, pgrep -f '^([^ ]*/)?puma ' will match the right process, but experiment a bit to make sure that you're getting what you want and no more.
Once you're satisfied that pgrep is finding the process you want to kill, replace pgrep by pkill.
answered May 9 at 22:04
Gilles
503k1189951522
Great solution. Thanks!
– Dave
May 9 at 22:52
add a comment |Â
up vote
4
down vote
accepted
up vote
4
down vote
accepted
Use pgrep instead of filtering the output from ps. I think in your case, pgrep -f '^([^ ]*/)?puma ' will match the right process, but experiment a bit to make sure that you're getting what you want and no more.
Once you're satisfied that pgrep is finding the process you want to kill, replace pgrep by pkill.
answered May 9 at 22:04
Gilles
503k1189951522
Use pgrep instead of filtering the output from ps. I think in your case, pgrep -f '^([^ ]*/)?puma ' will match the right process, but experiment a bit to make sure that you're getting what you want and no more.
Once you're satisfied that pgrep is finding the process you want to kill, replace pgrep by pkill.
answered May 9 at 22:04
Gilles
503k1189951522
answered May 9 at 22:04
Gilles
503k1189951522
answered May 9 at 22:04
Gilles
503k1189951522
answered May 9 at 22:04
Gilles
503k1189951522
503k1189951522
Great solution. Thanks!
– Dave
May 9 at 22:52
add a comment |Â
Great solution. Thanks!
– Dave
May 9 at 22:52
Great solution. Thanks!
– Dave
May 9 at 22:52
Great solution. Thanks!
– Dave
May 9 at 22:52
add a comment |Â
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I naively assume you can grep for more text from that line of
ps, why can't you?– ajeh
May 9 at 21:53