Heratech

Error: Could not stat() command file '/var/lib/nagios3/rw/nagios.cmd'!
 
The external command file may be missing, Nagios may not be running, and/or Nagios may not be checking external commands.
 
An error occurred while attempting to commit your command for processing.

sudo /etc/init.d/nagios3 stop
sudo dpkg-statoverride --update --add nagios www-data 2710 /var/lib/nagios3/rw
sudo dpkg-statoverride --update --add nagios nagios 751 /var/lib/nagios3
sudo /etc/init.d/nagios3 start