Bash script - Using telnet inside bash script
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Public Domain
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    #!/bin/bash

    IP="172.16.1.1"
    USER="username"
    PASS="password"
    ENABLE="enpass"

    ( sleep 1;  echo $USER
      sleep 1;  echo $PASS
      sleep 1;  echo enable
      sleep 1;  echo $ENABLE
      sleep 1;  echo terminal length 0
      sleep 1;  echo sh run 
      sleep 3;  echo exit ) | telnet $IP

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_BY: Pejman Moghadam_  
_TAG: telnet_  
_DATE: 2013-12-24 12:53:08_