Understanding the network.pdf - Back to Home

echo $size-Bit Loss Statistics > $temp/head.temp
# Generate Report
cat $temp/head.temp $logfile.rept > $logfile.$size
rm $logfile.t $logfile.rept $temp/head.temp
#
# End of the Check Script Command Section
# report mailer section
cat $temp/load.data.* > $logfile
cat $logfile | mail -s " Packet Loss Report from $target" $mailtarget
# End Of Script
For performing host monitoring, ping can be used in a script to periodically send
messages to a group of hosts. This example also runs as a UNIX Cron job. It sends
a set of ICMP messages to a set of hosts. If the hosts fail to send an ICMP
echo-request, the script sends an email notice. This script works well for off-site
notification if you have the capability to receive email on your pager.
#!/bin/sh
# This is a simple ping check script that is run from a UNIX
# cron job. Ideally, you want to run this script on two different
# hosts that can send mail alerts in the event of a host failure.
#
# To have the script run every five minutes, use the following Cron
# entry.
#
#0,5,10,15,20,25,30,35,40,45,50,55 * * * * /usr/local/etc/ping.sh
#
#Enter the hosts you want to ping here. The host entry can be an
# IP address or hostname. Entries should be separated by a space.
hosts="testhost testhost2 192.168.33.1"
# Enter the paths for ping and mail for your UNIX environment here.
ping=/bin/ping
mail=/usr/bin/Mail