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Full Discussion: Expect script not passing password / commands ??
Top Forums Shell Programming and Scripting Expect script not passing password / commands ?? Post 303031745 by rbatte1 on Tuesday 5th of March 2019 07:11:22 AM
Old 03-05-2019
Is there a reason not to generate an SSH key to provide a passwordless connection? Using expect is trying to break through the well considered security practice of SSH.

If you get it set up, then the client just needs to call in in one line. The following allow for progressively more complex calls according to your need. You only need the simplest one that works for you:-
Code:
ssh $target_server_name $remote_command_to_run
ssh $user_name@$target_server_name $remote_command_to_run
ssh -i $private_key_location $user_name@$target_server_name $remote_command_to_run

Would that not simplify the client side code? Is there a reason to attack SSH with expect? I assume you have credentials to get to each server. This will take a little effort first time to get the SSH connection set up, but then it is so much easier to actually use and leaves your script much cleaner.



Kind regards,
Robin
 

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LEARN ABOUT LINUX

ssh-keysign

SSH-KEYSIGN(8)						    BSD System Manager's Manual 					    SSH-KEYSIGN(8)

NAME

     ssh-keysign -- ssh helper program for host-based authentication

SYNOPSIS

     ssh-keysign

DESCRIPTION

     ssh-keysign is used by ssh(1) to access the local host keys and generate the digital signature required during host-based authentication with
     SSH protocol version 2.

     ssh-keysign is disabled by default and can only be enabled in the global client configuration file /etc/ssh/ssh_config by setting
     EnableSSHKeysign to ``yes''.

     ssh-keysign is not intended to be invoked by the user, but from ssh(1).  See ssh(1) and sshd(8) for more information about host-based authen-
     tication.

FILES

     /etc/ssh/ssh_config
	     Controls whether ssh-keysign is enabled.

     /etc/ssh/ssh_host_dsa_key
     /etc/ssh/ssh_host_ecdsa_key
     /etc/ssh/ssh_host_rsa_key
	     These files contain the private parts of the host keys used to generate the digital signature.  They should be owned by root, read-
	     able only by root, and not accessible to others.  Since they are readable only by root, ssh-keysign must be set-uid root if host-
	     based authentication is used.

     /etc/ssh/ssh_host_dsa_key-cert.pub
     /etc/ssh/ssh_host_ecdsa_key-cert.pub
     /etc/ssh/ssh_host_rsa_key-cert.pub
	     If these files exist they are assumed to contain public certificate information corresponding with the private keys above.

SEE ALSO

     ssh(1), ssh-keygen(1), ssh_config(5), sshd(8)

HISTORY

     ssh-keysign first appeared in OpenBSD 3.2.

AUTHORS

     Markus Friedl <markus@openbsd.org>

BSD
								  August 31, 2010							       BSD
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