Monitoring Processes with Kill

Posted by Sander_Marechal on Aug 15, 2008 4:58 AM EDT
Linux Journal
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If you have a process ID but aren't sure whether it's valid, you can use the most unlikely of candidates to test it: the kill command. If you don't see any reference to this on the kill(1) man page, check the info pages. The man/info page states that signal 0 is special and that the exit code from kill tells whether a signal could be sent to the specified process (or processes).

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