Permission denied error, while executing Nagios binaries
Nagios provides enterprise-class Open Source monitoring of hosts and services.
Make sure that the Nagios user has correct ownership/permissions to Nagios files in the Nagios installation directory.
Check if SElinux is enabled. If it is enabled, the Nagios binaries won’t be executed.
There are 3 alternative solutions for this.
1) Disable SElinux, SELINUX=disable.
2) Make it execute non-built-in services like Nagios by setting, SELINUX=permissive. This would cause the binaries to execute with only warnings logged to /var/log/messages.
If you go for the fix 1 or 2, you would need to reboot the server once.
3) You can change the security context of the Nagios binaries and make them executable with SElinux enabled.
chcon -R -t sbin_t /usr/local/nagios/sbin/
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