Home » Linux » How to stop a screen process in linux?

How to stop a screen process in linux?

Posted by: admin November 29, 2017 Leave a comment

Questions:

I am running a script on a remote server. I ran the script in screen, however I need to stop it before it completes since I need to update the script. I can easily detach from screen, however, is there a way to kill a screen process?

Answers:

CTRL+a and then ‘k’ will kill a screen session.

Questions:
Answers:

There are a couple of ‘screen’ ways to kill a specific screen session from the command line (non-interactively).

1) send a ‘quit’ command:

screen -X -S "sessionname" quit

2) send a Ctrl-C to a screen session running a script:

screen -X -S "sessionname" stuff "^C"

In both cases, you would need to use ‘screen -ls’ to find the session name of the screen session you want to kill … if there is only one screen session running, you won’t need to specify the -S “sessionname” parameter.

Questions:
Answers:

I used this to quit hundreds of erroneous screen sessions created by a buggy command:

for s in $(screen -ls|grep -o -P "1\d+.tty"); do screen -X -S $s quit; done;

where: the grep -o -P "1\d+.tty" is the command to get session names with Perl-like name regex "1\d+.tty" which captures all sessions start with number 1, has some other numbers (\d) and end with .tty

Warning:
You should test with this command first to see you get the exact list of sessions you want before apply the above command. This is to avoid quitting unwanted sessions:

for s in $(screen -ls|grep -o -P "1\d+.tty"); do echo $s; done;

I always to this echo test whenever the list in for loop is not clear, for example, the one generated by sub-command in $() expansion.