Hi there!
I need to write a script that makes a telnet (or ssh) to another host, and run another script there.
How can I make it in order to supply the password in the script?
Thank you, in advance.
Hi,
this is a bit more complicated than it looks because ssh has security forbids redirecting the stdin, as far as I know. There are several libraries e.g. for python pyssh and perl Net:SSH which can handle this situation. But of course you can also use passwordless public key authentication or public key authentication with ssh-agent so that no password input is requires on ssh connect.
Hope this helps
What Monex said. Here’s a good how-to.
OpenSSH Public Key Authentication
I don’t use Telnet, but we use this all the time with SSH in scripts. We have servers in another city that rsync backups into one of our machines overnight. The scripts are run as cron jobs to give us automatic, off-site backup.
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Agreed with both responses. Use keys as they are simple to use, not too
bad to setup, and typically safer than passwords.
Also, telnet should never be used with usernames/passwords… ever.
Anything you authenticate-to via that should be considered open to the
world… might as well not have a username/password.
Good luck.
smpoole7 wrote:
> What Monex said. Here’s a good how-to.
>
> ‘OpenSSH Public Key Authentication’
> (http://sial.org/howto/openssh/publickey-auth/)
>
> I don’t use Telnet, but we use this all the time with SSH in scripts.
> We have servers in another city that rsync backups into one of our
> machines overnight. The scripts are run as cron jobs to give us
> automatic, off-site backup.
>
>
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ssh can also read passwords from stdin using the “fd0ssh” tool from hxtools.
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Or ‘expect’ which is a freeware open source tool… but it’s still not
the best idea ever. Use keys and at least slow a malicious user down a
little.
Good luck.
jengelh wrote:
> ssh can also read passwords from stdin using the “fd0ssh” tool from
> hxtools.
>
>
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