Automated Password Change Post: 60015

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Top Forums UNIX for Advanced & Expert Users Automated Password Change Post 60015 by saabir on Friday 7th of January 2005 04:05:38 AM

01-07-2005

Registered User

Automated Password Change

Hi All
I need to automate (execute from a script or loop on the command line) password changes on a number of UNIX boxes. I cannot use telnet since I have disabled this on all servers - and installed SSH.

I have root private/public keys setup so that I can login directly into the boxes non-interactively, hence I am looking for something like this:

ssh $hostname "/path/to/a/local/script"

Obviously that script can take username and password variables from a access restricted file on each host, or even specify these in the script itself. What I plan on doing is pushing the same script out to all servers and then executing it.

The problem is, as we all know, passwd is interactive, and I just cannot get it to read from stdin. I have tried:

passwd $username<<EOF
password
password
EOF

But this does not work.

The reason I need to use passwd is because the boxes are installed with a variety of UNIXes, so I need something that will work universally, and not something that relies upon OS specific tools.

Any ideas? Or anyone have any better ways to do this ( bearing in mind the solution must be cross-platform friendly).

Any help is much appreciated.

saabir

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ssh-argv0

SSH-ARGV0(1)						    BSD General Commands Manual 					      SSH-ARGV0(1)

NAME

     ssh-argv0 -- replaces the old ssh command-name as hostname handling

SYNOPSIS

     hostname | user@hostname [-l login_name] [command]

     hostname | user@hostname [-afgknqstvxACNTX1246] [-b bind_address] [-c cipher_spec] [-e escape_char] [-i identity_file] [-l login_name]
     [-m mac_spec] [-o option] [-p port] [-F configfile] [-L port:host:hostport] [-R port:host:hostport] [-D port] [command]

DESCRIPTION

     ssh-argv0 replaces the old ssh command-name as hostname handling.	If you link to this script with a hostname then executing the link is
     equivalent to having executed ssh with that hostname as an argument.  All other arguments are passed to ssh and will be processed normally.

OPTIONS

     See ssh(1).

FILES

     See ssh(1).

AUTHORS

     OpenSSH is a derivative of the original and free ssh 1.2.12 release by Tatu Ylonen.  Aaron Campbell, Bob Beck, Markus Friedl, Niels Provos,
     Theo de Raadt and Dug Song removed many bugs, re-added newer features and created OpenSSH.  Markus Friedl contributed the support for SSH
     protocol versions 1.5 and 2.0.  Jonathan Amery wrote this ssh-argv0 script and the associated documentation.

SEE ALSO

     ssh(1)

Debian Project							 September 7, 2001						    Debian Project

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