Things to Do With 'kill'
Jan 06, 2009, 23:34 (1 Talkback[s])
(Other stories by Juliet Kemp)
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"kill -0 pid: This doesn't actually kill the process, just
returns 0 (success) if the process exists and 1 (failure) if not.
The command itself will not give you any output -- you have to look
at the exit code, using echo $? to get the information. So as a
"kill -0 1685; echo $?"