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Full Discussion: ssh and passwd scripting execution problems on linux
Operating Systems Linux ssh and passwd scripting execution problems on linux Post 302544900 by wdog17 on Friday 5th of August 2011 10:32:22 AM
Old 08-05-2011
ssh and passwd scripting execution problems on linux
I'm having a problem here and I was wondering if anyone could help me? I'm putting together a password script. First off, I don't have root access. I have sudo access. Lets say the User ID is Trevor1, the password is H!rry23! and the server name is Linux1234


This is how the script begins

Code:
#!/bin/bash
 
 
read -p "Enter User ID"= useridname
read -p "Password"= userpasswd
 
read -p "Enter Server(s)"= servertext && echo $servertext > serverlist
 
for i in `cat serverlist`
do
echo "$i"
ssh $i sudo /usr/bin/passwd --stdin $useridname | echo -n $userpasswd
 
 
cat /dev/null > serverlist
done



Everything goes well until I get to this portion of the script :

Code:
ssh $i sudo /usr/bin/passwd --stdin $useridname | echo -n $userpasswd

The the output is:

Code:
Linux1234
H!rry23! Enter passphrase for key '/local_home/username/.ssh/id_dsa


After I enter the passphrase key and press enter, the cusor will just sit there forever.

After a long while i'll get this output:


Code:
passwd: Authentication information cannot be recovered


What's going wrong? And how can this be fixed
Last edited by pludi; 08-05-2011 at 11:38 AM..
 

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LEARN ABOUT CENTOS

sulogin

SULOGIN(8)						       System Administration							SULOGIN(8)

NAME

       sulogin - Single-user login

SYNOPSIS

       sulogin [options] [tty]

DESCRIPTION

       sulogin is invoked by init when the system goes into single user mode.

       The user is prompted:

	    Give root password for system maintenance
	    (or type Control-D for normal startup):

       sulogin	will  be  connected  to  the  current terminal, or to the optional tty device that can be specified on the command line (typically
       /dev/console).

       After the user exits the single-user shell or presses control-D at the prompt, the system will continue to boot.

OPTIONS

       -e, --force
	      If the default method of obtaining the root password via getpwnam(3)  from  the  system  fails,  manually  examine  /etc/passwd  and
	      /etc/shadow to get the password.	If they are damaged or nonexistent, sulogin will start a root shell without asking for a password.

	      Only use the -e option if you are sure the console is physically protected against unauthorized access.

       -p, --login-shell
	      Specifying this option causes sulogin to start the shell process as a login shell.

       -t, --timeout seconds
	      Specify the maximum amount of time to wait for user input.  By default, sulogin will wait forever.

       -h, --help
	      Print a help message.

       -V, --version
	      Output version.

ENVIRONMENT VARIABLES

       sulogin looks for the environment variable SUSHELL or sushell to determine what shell to start.	If the environment variable is not set, it
       will try to execute root's shell from /etc/passwd.  If that fails it will fall back to /bin/sh.

AUTHOR

       sulogin was written by Miquel van Smoorenburg for sysvinit and later ported to util-linux by Dave Reisner and Karel Zak.

AVAILABILITY

       The sulogin command is part of the util-linux package and is available  from  Linux  Kernel  Archive  <ftp://ftp.kernel.org/pub/linux/utils
       /util-linux/>.

util-linux							     Jul 2012								SULOGIN(8)
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