SSH, again... Post: 25636

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Top Forums UNIX for Advanced & Expert Users SSH, again... Post 25636 by kjd on Thursday 1st of August 2002 04:20:39 PM

08-01-2002

Registered User

If you need to log in as a user other than the current username on the local side (e.g. you're logged in as penguin, and want to log in to the remote machine as tux, not penguin), specify the username either with the -l (login) option, or username@host format.

$ ssh tux@mouton uname -a

or

$ ssh -l tux mouton uname -a

If you're wanting to run remote commands without entering your password every time, read up on SSH public-key authentication. When you have your public-key auth set up correctly between the two machines, use ssh-agent(1) to store your password locally, and authenticate you to other servers. The ssh-agent program will prompt you only once for your private key passphrase, then do authentication to other machines for you until you kill the ssh-agent process.

If you create your private key without a passphrase (by pressing Enter when prompted for passphrase), it will be unencrypted and you will never need to input a passphrase to decrypt your private key for authentication. I do not recommend this method when it can be avoided, for the obvious security reasons (if someone obtains access to the file, it is unprotected and they will be able to authenticate as you to other machines).

kjd

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LEARN ABOUT REDHAT

ssh-keysign

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

NAME

     ssh-keysign -- ssh helper program for hostbased 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 hostbased authentication with
     SSH protocol version 2.

     ssh-keysign is disabled by default and can only be enabled in the the global client configuration file /etc/ssh/ssh_config by setting
     HostbasedAuthentication 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 hostbased authen-
     tication.

FILES

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

     /etc/ssh/ssh_host_dsa_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 hostbased
	     authentication is used.

SEE ALSO

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

AUTHORS

     Markus Friedl <markus@openbsd.org>

HISTORY

     ssh-keysign first appeared in OpenBSD 3.2.

BSD
								   May 24, 2002 							       BSD