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Top Forums Shell Programming and Scripting Change root password remotely Post 302519965 by trey85stang on Thursday 5th of May 2011 01:31:29 PM
Old 05-05-2011
expect will do what you need.

with expect you can ssh to the remote box, run passwd, enter in the info, confirm it and exit the ssh session.

---------- Post updated at 12:31 PM ---------- Previous update was at 12:21 PM ----------

quick example... this probably wont work.. I did it all off the top of my head.

Code:
#!/usr/bin/expect -f

set ipaddress [lindex $argv 0]
set password [lindex $argv 1]

set timeout 10
spawn ssh -o StrictHostKeyChecking=no -o Batchmode=yes root@$ipaddress
expect {
  blah@blah# {
    send "passwd\r"
    expect {
      New Password: {
        send "$passwod\r"
	expect { 
	  Reenter New Password: {
	    send "$password\r
          }
        }
      }
    }
  exp_continue 
  }
  "Password changed." {
   return 0
  }
  timeout {
  return 1
  }
}
expect eof

 

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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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