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Full Discussion: Updating the comments field on /etc/passwd
Top Forums Shell Programming and Scripting Updating the comments field on /etc/passwd Post 302275734 by Linux Duke on Monday 12th of January 2009 03:18:26 AM
Old 01-12-2009
Question Updating the comments field on /etc/passwd
Hi there,

I have more that 300 servers that I need to updated the comments field on /etc/passwd for users that have a blank comments fields. The users have accounts on different servers. I have created a list of these users on a text file called update.txt check below.
I need a script that will compare this file with /etc/passwd first backup the passwd database and update the comment field on /etc/passwd with the details on the text file if it's blank.
I have a script that I have created not sure if it will do the job as I have not worked a lot with scripts.
Below is my script and attached is my text file:
Code:
#!/usr/bin/bash
FILE1=/tmp/update.txt
FILE2=/etc/passwd
cp $FILE2 /etc/passwd.orig

for i in `cat $FILE1 | awk -F":" '{ print $2 }'`
do
 FIELD1=`cat $FILE1 | grep ${i} |awk -F":" '{ print $3 }'`
 grep $i ${FILE2}
 if [ $? -eq 0 ]
 then
  usermod -c "${FIELD1}" $i
 fi
done

I will highly appreciate your assistance.

Update.txt

SERVER1:SINLO_R:SINLO ROGGER
SERVER1:AVNlnx:LINUX Admistrator/junior
SERVER1:nfsnobody:LINUX Admistrator
SERVER1:REGGIE_P:REGGIE PABLO
SERVER1:STONE_P:STONE PANE
SERVER2:SINLO_R:SINLO ROGGER
SERVER2:AVNLNX:LINUX Admistrator/junior
SERVER2:nfsnobody:LINUX Admistrator
SERVER2:REGGIE_P:REGGIE PABLO
SERVER2:STONE_P:STONE PANE
Last edited by otheus; 01-12-2009 at 10:36 AM.. Reason: [code] tags and formatting
 

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LEARN ABOUT DEBIAN

update-passwd

UPDATE-PASSWD(8)					      System Manager's Manual						  UPDATE-PASSWD(8)

NAME

       update-passwd - safely update /etc/passwd, /etc/shadow and /etc/group

SYNOPSIS

       update-passwd [options]

DESCRIPTION

       update-passwd  handles updates of /etc/passwd, /etc/shadow and /etc/group on running Debian systems.  It compares the current files to mas-
       ter copies, distributed in the base-passwd package, and updates all entries in the global system range (that is, 0-99).

OPTIONS

       update-passwd follows the usual GNU command line syntax, with long options starting with two dashes ('-').

       -p, --passwd-master=FILE
	      Use FILE as the master copy of the passwd database.  The default value is /usr/share/base-passwd/passwd.master.

       -g, --group-master=FILE
	      Use FILE as the master copy of the group database.  The default value is /usr/share/base-passwd/group.master.

       -P, --passwd=FILE
	      Use FILE as the system passwd database.  The default value is /etc/passwd.

       -S, --shadow=FILE
	      Use FILE as the system shadow database.  The default value is /etc/shadow.

       -G, --group=FILE
	      Use FILE as the system group database.  The default value is /etc/group.

       -s, --sanity-check
	      Only perform sanity-checks but don't do anything.

       -v, --verbose
	      Give detailed information about what we are doing.  A second -v gives additional detail.

       -n, --dry-run
	      Don't do anything but only show what we would do.

       -L, --no-locking
	      Don't attempt to lock the account database.  This should only be used for debugging purposes.  I repeat: do not do this  unless  you
	      are really sure you need this!

       -h, --help
	      Show a summary of how to use update-passwd.

       -V, --version
	      Show the version number

BUGS

       At  this  moment  update-passwd	does not verify the shadow-file.  It should check if the entries in the passwd are also in shadow and vice
       versa, and that passwords are not present in both files.

AUTHOR

       Wichert Akkerman <wakkerma@debian.org>

       This program was written for the Debian project, and is copyright 1999-2002 Wichert Akkerman and copyright 2002, 2003 Colin Watson.  It	is
       distributed under version 2 of the GNU General Public License.

DEBIAN
								   Debian tools 						  UPDATE-PASSWD(8)
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