[Pkg-nagios-devel] Bug#1117606: [DKIM] Bug#1117606: nagios-nrpe-server.service: Referenced but unset environment variable evaluates to an empty string: NRPE_OPTS

[Larsen]

 > > The reason for this is that NRPE_OPTS is used in 
"/etc/systemd/system/multi-user.target.wants/nagios-nrpe-server.service" 
but is commented out in "/etc/default/nagios-nrpe-server".

 > This is very common for default files, which we're unlikely to change to 
please systemd.

The fix is as simple as adding NRPE_OPTS="" to the top of the file...