#!/bin/bash
# check memory script
# sunny 2008.2.15
# Total memory
TOTAL=`free -m | head -2 |tail -1 |gawk '{print $2}'`
# Free memory
FREE=`free -m | head -2 |tail -1 |gawk '{print $4}'`
# to calculate free percent
# use the expression  free * 100 / total
FREETMP=`expr $FREE * 100`
PERCENT=`expr $FREETMP / $TOTAL`
echo "$FREE MB ($PERCENT%) Free Memory"
exit 0

# 'check_mem' command definition
define command{
        command_name    check_mem
        command_line    $USER1$/check_mem.sh -H $HOSTADDRESS$
        }
 

define service{
        host_name               nagios-server
        service_description     check_mem
        check_command           check_mem
        max_check_attempts      5
        normal_check_interval   3
        retry_check_interval    2
        check_period            24x7
        notification_interval   10
        notification_period     24x7
        notification_options    w,u,c,r
        contact_groups          sagroup
        }