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Top Forums Shell Programming and Scripting Unix script to change password Post 302380986 by rdcwayx on Wednesday 16th of December 2009 08:49:56 PM
Old 12-16-2009
No need to use expect.

First, you need set a ssh keyless pass with root on all servers. With that, you needn't provide password to ssh to other servers.

Second, set your new password on your local server. and get the new unix keypass from /etc/shadow.

Code:
nimo:QKDPc5E$S.:12825:0:90:5:30:13096:

run the command: (sample only)

Code:
for server in `cat server_list`
do
   ssh root@$server perl -pe -i.bak 's/^nimo:$SWlkjRWexrXYgc98F/^nimo:QKDPc5E$S./' /etc/shadow
done

Please test it on one server first, then go for next servers.

if the Unix keypass includes \ or some other special chars, maybe you need add \ before them.

Last edited by rdcwayx; 12-18-2009 at 02:10 AM..
 

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SSH-COPY-ID(1)						      General Commands Manual						    SSH-COPY-ID(1)

NAME
ssh-copy-id - install your public key in a remote machine's authorized_keys SYNOPSIS
ssh-copy-id [-i [identity_file]] [user@]machine DESCRIPTION
ssh-copy-id is a script that uses ssh to log into a remote machine (presumably using a login password, so password authentication should be enabled, unless you've done some clever use of multiple identities) It also changes the permissions of the remote user's home, ~/.ssh, and ~/.ssh/authorized_keys to remove group writability (which would oth- erwise prevent you from logging in, if the remote sshd has StrictModes set in its configuration). If the -i option is given then the identity file (defaults to ~/.ssh/id_rsa.pub) is used, regardless of whether there are any keys in your ssh-agent. Otherwise, if this: ssh-add -L provides any output, it uses that in preference to the identity file. If the -i option is used, or the ssh-add produced no output, then it uses the contents of the identity file. Once it has one or more fin- gerprints (by whatever means) it uses ssh to append them to ~/.ssh/authorized_keys on the remote machine (creating the file, and directory, if necessary) SEE ALSO
ssh(1), ssh-agent(1), sshd(8) OpenSSH 14 November 1999 SSH-COPY-ID(1)
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