Sorry, but Nagios is currently not checking for external commands, so your command will not be committed!

Sorry, but Nagios is currently not checking for external commands, so your command will not be committed!

# vi /etc/nagios3/nagios.cfg

check_external_command=1

# /etc/init.d/nagios3 restart

Reference :
Fix to Nagios is currently not checking for external commands | Walking in Light with Christ - Faith, Computing, Diary