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06-28-2011, 02:58 AM
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#1
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LQ Newbie
Registered: Jun 2006
Posts: 21
Rep: 
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usage of kill -0 pid
I was looking into a shell script which had a line "kill -0 [pid]" , I would like to know what the -0 flag does as i found it is not killing the particular [pid] process.
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06-28-2011, 03:29 AM
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#2
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Moderator
Registered: Jun 2001
Location: UK
Distribution: Gentoo, RHEL, Fedora, Centos
Posts: 43,417
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The null signal can be used to check the validity of the pid.
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06-28-2011, 03:34 AM
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#3
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Member
Registered: Oct 2006
Location: bangalore
Distribution: Fedora, Ubuntu, Debian, Redhat
Posts: 82
Rep: 
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Please have a look at http://linux.die.net/man/2/kill
I am also not much familiar with sig 0.
--Rameez |
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