Works

Requires a little bit of fiddling.
If you get a No Health Status Line error with NRPE
there is a fix for this. What I did to resolve this issues was go to /etc/passwd

My nagios user was :
nagios:x:108:119::/var/lib/nagios:/bin/false

I changed it to :
nagios:x:108:119::/var/lib/nagios:/bin/sh

And now it’s working like a charm. Hopefully this helps some one. It took me forever to figure out why It wasn’t working auto-magically, but worked when I ran the command manually.