I have a process that is already running for a long time and don't want to end it.
How do I put it under nohup (i.e. how do I cause it to continue running even if I close the terminal?)
Source: Tips4all, CCNA FINAL EXAM
Source: Tips4all, CCNA FINAL EXAM
Using the Job Control of bash to send the process into the background:
ReplyDelete> [crtl]+z
> bg
And as Sam/Jan mentioned you have to execute disown to avoid killing the process after you close the terminal.
disown -h
The command to seperate a running job from the shell ( = makes it nohup) is disown and a basic shell-command.
ReplyDeleteFrom bash-manpage (man bash):
disown [-ar] [-h] [jobspec ...]
Without options, each jobspec is removed from the table of active jobs. If the -h option is given, each jobspec is not
removed from the table, but is marked so that SIGHUP is not sent to the job if the shell receives a SIGHUP. If no jobspec is
present, and neither the -a nor the -r option is supplied, the current job is used. If no jobspec is supplied, the -a option
means to remove or mark all jobs; the -r option without a jobspec argument restricts operation to running jobs. The return
value is 0 unless a jobspec does not specify a valid job.
That means, that a simple
disown
will remove all jobs from the job-table and makes them nohup
these are good answers above, I just wanted to add a clarification, You can't disown a pid or process, you disown a Job, and there is an important distinction. A Job is something that is a notion of a process that is attached to a shell. Therefore, you have to through the job into the background (not suspend it) and then disown it.
ReplyDeleteissue:
% jobs
[1] running java
[2] suspended vi
% disown %1
See http://www.quantprinciple.com/invest/index.php/docs/tipsandtricks/unix/jobcontrol/
for a more detailed discussion of Unix Job Control.
Suppose for some reason Ctrl+Z is also not working, go to another terminal, find the process id (using ps) and run
ReplyDeletekill -20 PID
kill -18 PID
kill -20 will suspend the process and kill -18 will resume the process, in your other terminal