Trying to monitor mysql 5.0.77 with nagios 3.2.1 under CentOS 5.4. Everything with nagios has been running without a hitch for me, however, when I added the following to /etc/nagios/objects/localhost.cfg to try to monitor mysql, I get an error that reads "Running configuration check... CONFIG ERROR! Restart aborted. Check your Nagios configuration."


define service{
use local-service
host_name localhost
service_description MYSQL
check_command check_mysql
notifications_enabled 1
}


This is pretty much what I added to monitor other things on the server such as ftp and smtp, just switched out check_smtp with check_mysql, etc.

Before start the Nagios services just check is there any configuration errors on cfg files
Please follow the path where you have installed nagios

Thanks for the help! I got an error saying that check_mysql wasn't defined anywhere, so I just added,

define command{
command_name check_mysql
command_line $USER1$/check_mysql -u $USER1$
}

to /etc/nagios/objects/command.cfg and everything seems to be working quite well.