I'm connecting to a Linux machine through SSH, and I'm trying to run a heavy bash script that makes filesystem operations. It's expected to keep running for hours, but I cannot leave the SSH session open because of internet connections issues I have.
I doubt that running the script with the background operator, the ampersand (&), will do the trick, because I tried it and later found that process was not completed. How can I logout and keep the process running?
I want to start process (eg. myCommand) and get its pid (to allow to kill it later).
I tried ps and filter by name, but I can not distinguish process by names
myCommand
ps ux | awk '/<myCommand>/ {print $2}'
Because processes names are not unique.
I can run process by:
myCommand &
I found that I can get this PID by:
echo $!
Is there any simpler solution?
I would be happy to execute myCommand and get its PID as a result of one line command.
A colleague of mine recently ran into a problem where a process that had supposedly died was still bound to a network port, preventing other processes from binding to that port. Specifically, netstat -a -b was reporting that a process named System with PID 4476 had port 60001 open, except no process with PID 4476 existed, at least as far as I could tell.
Process Explorer and Task Manager did not list PID 4476 (though there was another process named System with PID 4, which had its own set of TCP connections that did not include 60001). taskkill /PID 4476 also reported that PID 4476 could not be found.
Is there a way to kill this mysterious System process to free up the port to which it's currently bound? What can cause this to happen? How can there be processes that none of Task Manager, Process Explorer, and taskkill don't know about? Rebooting managed to fix the problem, but I'd like to know if there's a way to fix this without rebooting.
I'm running a Rails stack on Ubuntu.
When I call ps -AF, I get a descriptive process name set by the Apache module like
00:00:43 Rails: /var/www...
which is really helpful in diagnosing load issues.
But when I call top, the same process shows up simply as
ruby
Is there any way to get the ps -AF process name in top?
Is there a way to sort ps output by process start time, so newest are either at the top or bottom ?
On Linux ?
On SysV5 ?
On Mac ?