asked on

Help with shell script

I need to have a script that will automatically log into a network device, reset a port, and exit the network device. The script will be passed three values - ip address, device password and port number. The contents of the shell script are as follows:

telnet $1
<need a carriage return here>
cli
su
$2
admin
reset po = $3
hangup
exit

I am not sure how to add a carriage return after each command. I would appreciate any advice on how to do that and if there are any other commands I need to add to the script.

Tintin

You are probably going to need to use 'expect' here, but it does depend on how your network device handles passwords.

Try

telnet $1 `cat <<EOF

cli
su
$2
admin
reset po = $3
hangup
exit
EOF`

Tintin

Ignore the above, it is incorrect.

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ahoffmann

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JulieBouillon

Hi,

It could easily be done in perl with the Net::Telnet module, see the simple example below:
#!/usr/bin/perl
use strict;
use Net::Telnet;

my $telnet = new Net::Telnet( Errmode=>'die',
Prompt => '/\# $/i');
$telnet->open('yourhostname');
$telnet->login('user', 'password');
print $telnet->cmd('/usr/bin/pwd; ls');