M.I.T = Multimedia IT dept.

1) Edit /etc/nagios/misccommands.cfg
--
# 'host-notify-by-email' command definition
define command{
command_name host-notify-by-email
command_line /usr/bin/printf "%b" "***** Nagios 2.6 *****\n\nNotification Type: $NOTIFICATIONTYPE$\nHost: $HOSTNAME$\nState: $HOSTSTATE$\nAddress: $HOSTADDRESS$\nInfo: $HOSTOUTPUT$\n\nDate/Time: $LONGDATETIME$\n" | /bin/mail -s "Host $HOSTSTATE$ alert for $HOSTNAME$!" $CONTACTEMAIL$
}


# 'host-notify-by-epager' command definition
define command{
command_name host-notify-by-epager
command_line /usr/bin/printf "%b" "Host '$HOSTALIAS$' is $HOSTSTATE$\nInfo: $HOSTOUTPUT$\nTime: $LONGDATETIME$" | /bin/mail -s "$NOTIFICATIONTYPE$ alert - Host $HOSTNAME$ is $HOSTSTATE$" $CONTACTPAGER$
}

# 'notify-by-email' command definition
define command{
command_name notify-by-email
command_line /usr/bin/printf "%b" "***** Nagios 2.6 *****\n\nNotification Type: $NOTIFICATIONTYPE$\n\nService: $SERVICEDESC$\nHost: $HOSTALIAS$\nAddress: $HOSTADDRESS$\nState: $SERVICESTATE$\n\nDate/Time: $LONGDATETIME$\n\nAdditional Info:\n\n$SERVICEOUTPUT$" | /bin/mail -s "** $NOTIFICATIONTYPE$ alert - $HOSTALIAS$/$SERVICEDESC$ is $SERVICESTATE$ **" $CONTACTEMAIL$
}


# 'notify-by-epager' command definition
define command{
command_name notify-by-epager
command_line /usr/bin/printf "%b" "Service: $SERVICEDESC$\nHost: $HOSTNAME$\nAddress: $HOSTADDRESS$\nState: $SERVICESTATE$\nInfo: $SERVICEOUTPUT$\nDate: $LONGDATETIME$" | /bin/mail -s "$NOTIFICATIONTYPE$: $HOSTALIAS$/$SERVICEDESC$ is $SERVICESTATE$" $CONTACTPAGER$
}
--
# chkconfig nagios on

2) setup a basic monitoring
# vi /etc/nagios/nagios.cfg
cfg_file=/etc/nagios/hosts.cfg
cfg_file=/etc/nagios/services.cfg
# vi /etc/nagios/hosts.cfg
define host{
use generic-host
host_name testserver
alias testserver
address testserver.org.tw
check_command check-host-alive
max_check_attempts 10
check_period 24x7
notification_interval 120
notification_period 24x7
notification_options d,r
contact_groups admins
}
# vi /etc/nagios/services.cfg
define service{
use generic-service
host_name testserver
service_description PING
is_volatile 0
check_period 24x7
max_check_attempts 4
normal_check_interval 5
retry_check_interval 1
contact_groups admins
notification_options w,u,c,r
notification_interval 960
notification_period 24x7
check_command check_ping!100.0,20%!500.0,60%
}

3) Change timezone and fireup nagios!!
# mv /etc/localtime /etc/localtime.old
# ln -s /usr/share/zoneinfo/Asia/Taipei /etc/localtime
# service nagios start
--
REFERENCES:
http://cactiusers.org/forums/topic1915.html
/etc/nagios/minimal.cfg