telnet to multiple Hosts/Routers from linux/unix bash command line

#!/bin/bash

export USERNAME=xxxxx <user-name-to-connect-to-the-node>
export PDW=xxxxxxxx        <password-of-the-user>

cat hosts.txt | while read H

#if the username and password are different for different nodes, the try here to get
# username and password in some variable. Awk/Perl or simple bash string replacement of variable
# H will do that.

do
( echo open $H
sleep 1
echo $USERNAME
sleep 1
echo $PDW
sleep 1
/somedir/some_script.sh 2>&1 > /dev/null
echo exit ) | telnet
done

Ref: http://www.unix.com/shell-programming-scripting/27474-perl-script-telnet.html

~ by mustafagolam on December 14, 2008.