Have you installed nagios yet? Have you read the instructions?

What platform? What version? Which plugin(s)? Where are you having trouble?

I have Instaled nagios and configured with pluins.I strucked at
Check_mysql

My command.cfg contains

# 'check_mysql' command defination

define command{

command_name check_mysql

Command_line $USER1$/check_mysql -u $ARG1$ -p $ARG2$ -H$HOSTADDRESS$

}



In my service defination it



define service{

use local-service ; Name of service template to use

host_name localhost

is_volatile 0

check_period 24x7

max_check_attempts 4

normal_check_interval 5

retry_check_interval 1

notification_interval 960

notification_period 24x7

service_description MySQL Running

check_command mysql_check!root!toyota

}

When I start nagios I got error Service check command 'mysql_check' specified in service 'MySQL Running' for host 'localhost' not defined anywhere

Can any one tell me solution.

lol
Your command_name is:
check_mysql

but in your service you demand:
mysql_check

see:-)

Use one name for both!

Sorry Both were Mysql_check.Can you tell me what is exact problem

no. Ive got no guessing-mode

Here are the steps to follow in order to achieve what you want:

http://kedar.nitty-witty.com/blog/10-steps-mysql-monitoring- nagios-installation-configuration