Could not open command file '/usr/local/nagios/var/rw/nagios.cmd'
Morris, Patrick
patrick.morris at hp.com
Sun May 18 19:34:31 CEST 2008
> I've update the Nagios version from 3.0b5 to 3.0.1 stable. But
> re-scheduling a new check for a service I get:
>
> -----------------------------------------------------------------------
> --
> Error: Could not open command file
> '/usr/local/nagios/var/rw/nagios.cmd'
> for update!
>
> The permissions on the external command file and/or directory may be
> incorrect. Read the FAQs on how to setup proper permissions.
>
> An error occurred while attempting to commit your command for
> processing.
> -----------------------------------------------------------------------
> --
>
> sparky:/usr/local/nagios/var/rw# ll
> total 0
> prw-rw---- 1 nagios nagios 0 2008-05-18 10:38 nagios.cmd
> sparky:/usr/local/nagios/var/rw# id nagios
> uid=1001(nagios) gid=1001(nagios) groups=1001(nagios),1002(nagcmd)
> sparky:/usr/local/nagios/var/rw# id www-data
> uid=33(www-data) gid=33(www-data) groups=33(www-data),1002(nagcmd)
>
> The permissions are according to Ubuntu Quickstart. Changing the group
> of nagios.cmd to nagcmd I get rid of the problem. But restarting
> Nagios,
> the nagios.cmd permissions are reset to nagios:nagios. What can be the
> problem?
Sounds like when you updated you compiled with a different user and/or group than your older version.
There are at least a couple ways to fix this. One would be to recompile Nagios to use a group your webserver is a member of. Another would be to set the "rw" directory setgid www-data so new files created there have that as their group. For that to work, the nagios user would also need to be a member of www-data.
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