Telnet and automatic login

[GMorris]

Hey everybody,

I have just a one line script that runs telnet, and even though I've looked around I thought maybe someone could just tell me if there is a way to automatically login to the telnet server without having to type it in everytime. It's more of a hassle type of thing, but no matter what I've tried, I can't get anything to work. Any suggestions?

G.

[meton_magis]

the short answer is a scripting language called expect. the long answer is why would you ever want to use telnet and not SSH?

With ssh you can use public / private keypair to have authentication without password prompts. That and the fact that it is not sending password in clear text make it a MUCH better option.

[GMorris]

I've heard of (and likely used) SSH since I installed Linux, but I don't know how to integrate it with Telnet through a standard TTY with a shell running. Any comments?

G.

[GMorris]

Well, I fooled around with it some, but I can't figure out how to get the user/pass combo to log in. Something like "ssh uname@machine.com telnet remote.com" but that doesn't seem to do it. Can anybody give an example or something to point me in the right direction?

[henrikau]

Hi,

create a keypair:

ssh-keygen -t rsa -b 2048

answer yes to all questions (default is perfectly fine)

copy the file $HOME/.ssh/id_rsa.pub to your target machine, it must be *appended* in $HOME/.ssh/authorized_keys2 on the target.

Then, log in via ssh

ssh username@server.example.org

Don't bother adding telnet to an ssh-command, they are *not* the same commands. And ssh will use a tty, so you should not have to change all that much in your script.

[GMorris]

Hi,

create a keypair:

ssh-keygen -t rsa -b 2048

answer yes to all questions (default is perfectly fine)

copy the file $HOME/.ssh/id_rsa.pub to your target machine, it must be *appended* in $HOME/.ssh/authorized_keys2 on the target.

Then, log in via ssh

ssh username@server.example.org

Don't bother adding telnet to an ssh-command, they are *not* the same commands. And ssh will use a tty, so you should not have to change all that much in your script.

I'll sure give it a try. I always knew SSH was there, I just never knew you could use it like this.

Thanks, I think!