'Nagios - Could not open command file /usr/local/nagios/var/rw/nagios.cmd’ for update

I'm trying to disable active check for a service through Nagios web interface, but I cant make it. The Nagios instance is running on a Centos 5 distribution

Each time I try to stop the service I get this message : Could not open command file ‘/usr/local/nagios/var/rw/nagios.cmd’ for update!

Although I tried several proposals found on the web : 

usermod -a -G nagios apache
chmod 666 /usr/local/nagios/var/rw/nagios.cmd
chown nagios.nagcmd /usr/local/nagios/var/rw
chmod u+rwx /usr/local/nagios/var/rw
chmod g+rwx /usr/local/nagios/var/rw  
chmod g+s /usr/local/nagios/var/rw

Each time rebooting nagios service afterwards of course.

Thanks for your help ! Cheers

monitoringnagios


Solution 1:[1]

Selinux can also cause this problem. You can check its status with:

sestatus

If current mode is enforcing, change it to permissive with:

setenforce 0

Then you may be able to commit your changes into nagios.cmd.

Solution 2:[2]

This is how you have to follow

service httpd stop

service nagios stop


usermod -G nagcmd nagios

usermod -G nagcmd apache

chown nagios:nagcmd /usr/local/nagios/var/rw

chown nagios:nagcmd /usr/local/nagios/var/rw/nagios.cmd


service httpd start

service nagios start

Solution 3:[3]

The following should fix the issue in Debian:

chown -R www-data:www-data /usr/local/nagios/var/

Solution 4:[4]

The only issue with this is selinux. Stop it and it will work fine. Credit goes to Nagios team.

Solution 5:[5]

I haven't seen this mentioned and it caught me out, it's worth checking the apache child processes are running as the apache user.

I built my apache from source and this uses daemon as the default user and group for the child processes so this had to be changed for this to work.

Solution 6:[6]

What worked for me is :

chmod ugo+rw /usr/local/nagios/var/rw/ /usr/local/nagios/var/rw/nagios.cmd

and restarting apache and nagios.

Sources

This article follows the attribution requirements of Stack Overflow and is licensed under CC BY-SA 3.0.

Source: Stack Overflow

Solution Source
Solution 1 Umut Uzun
Solution 2 Anirudh Sharma
Solution 3 mech
Solution 4 Saurabh Aditya
Solution 5 Rich J
Solution 6 Imran Rentia

Related Questions