telnet automatically

[Romeo_Lou]

How can i use telnet automatically, for other word, I want to telnet to another unix and I can use the user and password that predefine in script.
B^R

[U.SivaKumar_2]

Hi,
Create a script mytelnet.sh with below contents

#!/opt/local/bin/bash
(echo "testuser";\
echo "test123";\) | telnet x.x.x.x

Where x.x.x.x is the Ip address of the remote server.

regards,
U.SivaKumar

[U.SivaKumar_2]

Hi,
Create a script mytelnet.sh with below contents

#!/usr/bin/sh
(echo "testuser";\
echo "test123";\) | telnet x.x.x.x

Where x.x.x.x is the Ip address of the remote server.

regards,
U.SivaKumar

[T G Manikandan]

#!/bin/sh
(sleep 5
echo
sleep 5
echo
sleep 5
echo ls
sleep 5
echo exit) |telnet hostname

check this link
Clay has a perl script for telnet

http://forums.itrc.hp.com/cm/QuestionAnswer/1,,0x62777d4cf554d611abdb0090277a778c,00.html


Thanks

[John Meissner]

download and install a program called expect (included is autoexpect). after you download and install...
type autoexpect -f filename telnet servername

you will go through the login process and when you're done hit the to stop. This will write a script for you (filename) - edit this file and remove some extra characters durring the login process. I'm attaching an autoexpect script for you to use as an example.

[A. Clay Stephenson]

My method would be to use the Net::Telnet Perl module. You get user-selectable timeouts AND error-checking for free.

It can be as trivial as this (adapted from the man pages):

use Net::Telnet ();

my $passwd = "topsecret";
my $username = "cstephen";

$t = new Net::Telnet (Timeout => 15,
Prompt => '/bash\$ $/');
$t->open("sparky");
$t->login($username, $passwd);
@lines = $t->cmd("/usr/bin/who");
print @lines;


You can download the Net::Telnet module from www.perl.org/CPAN. It's really hard to beat the simplicity of this method especially when you would also like to automatically add error checking.

[Ken Hubnik_2]

Another consideration is using rlogin.

[John Meissner]

aren't the 'r' services a security hole though?