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Full Discussion: Automated Password Change
Top Forums UNIX for Advanced & Expert Users Automated Password Change Post 60015 by saabir on Friday 7th of January 2005 04:05:38 AM
Old 01-07-2005
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.
 

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LEARN ABOUT DEBIAN

fence_rsb

fence_rsb(8)						      System Manager's Manual						      fence_rsb(8)

NAME

       fence_rsb - I/O Fencing agent for Fujitsu-Siemens RSB

SYNOPSIS

       fence_rsb [OPTION]...

DESCRIPTION

       fence_rsb is an I/O Fencing agent which can be used with the Fujitsu-Siemens RSB management interface.  It logs into an RSB device via tel-
       net and reboots the associated machine. Lengthy telnet connections to the RSB device should be avoided  while  a  GFS  cluster  is  running
       because the connection will block any necessary fencing actions.

       fence_rsb  accepts  options  on	the  command  line  as well as from stdin.  Fenced sends parameters through stdin when it execs the agent.
       fence_rsb can be run by itself with command line options.  This is useful for testing.

       Vendor URL: http://www.fujitsu.com

OPTIONS

       -a IPaddress
	      IP address or hostname of the RSB device.

       -h     Print out a help message describing available options, then exit.

       -l login
	      Login name.

       -n telnet_port
	      The port number on which the telnet service listens.

       -o action
	      The action required.  This can be reboot (default), off, on, or status.

       -p password
	      Password for login.

       -S path
	      Full path to an executable to generate the password for login.

       -v     Verbose.	Print informational messages to standard out.

       -V     Print out a version message, then exit.

STDIN PARAMETERS

       agent = < param >
	      This option is used by fence_node(8) and is ignored by fence_rsb.

       ipaddr = < hostname | ip >
	      IP address or hostname of the device.

       telnet_port = < port number >
	      The port number on which the telnet service listens.

       login = < param >
	      Login name.

       option = < param >
	      The action required.  This can be reboot (default), off, on, or status.

       passwd = < param >
	      Password for login.

       passwd_script = < param >
	      Full path to an executable to generate the password for login.

SEE ALSO

       fence(8), fence_node(8)

																      fence_rsb(8)
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