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ssh is much easier to automate than telnet. It comes with the ability to do noninteractive logins built in. You'll find passwordless ssh (http://blogs.translucentcode.org/mick/archives/000230.html)...

If you need to enter a password into telnet, you'll pretty much have to use the expect language.

Do you really need to use telnet? why not ssh?

Yes, that's because you have to pipe things into telnet, it reads from standard input, it doesn't just magically take lines that happen to be below it.