Nagios Support Forum

Hi team,

We are using Nagios XI in our environment. We added a server and configured memory service to monitor memory for Linux. Checked and found that it is throwing an error as "critical" even though the server has sufficient amount of memory available.

Attaching is the screenshot.

Please help me the same.

You are missing the number (value) in front of the % sing... What is the OS of the remote machine (client)? Most probably you are missing a package. I can't remember if it was "bc" or "dc". One of these two. You can try running the following commands on the client:

On RHEL/CentOS On Debian/Ubuntu Let us know if this fixed the issue.

OS is RHEL 6.9..

You are missing the number (value) in front of the % sing :- Not clear about this.. Where we need to add this?

In the check command, for example:
And the percent sign is optional.