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Full Discussion: Adding users from a txt fille
Top Forums Shell Programming and Scripting Adding users from a txt fille Post 302921070 by Akshay Hegde on Tuesday 14th of October 2014 03:41:14 PM
Old 10-14-2014
You have to read file line by line and then create user

Code:
root@nio:/tmp# cat file
bart_simpson,andHisPassword
maggy_simpson,andHisPassword

Code:
root@nio:/tmp# cat adduser.sh
#!/bin/bash

if [ $# -lt 1 ]
  then
    echo "Usage : $0 userfile"
    exit
fi

if [ $(id -u) -eq 0 ]; then 	
	

while IFS=, read username password; do

	if egrep "^$username" /etc/passwd >/dev/null;  then 		
   		echo "$username exists!" 			
	else 		
  		password=$(perl -e 'print crypt($ARGV[0], "password")' $password) 		
  		
		if  useradd -m -p "$password" "$username" >/dev/null; then  
     			echo "User '$username' has been added to system!" 
  		else
     			echo "Failed to add  user '$username'!" 	
  		fi 
	fi
done <"$@"

else 	
      echo "Only root may add a user to the system" 	
      exit 
fi

Usage
Code:
root@nio:/tmp# sh adduser.sh file
User 'bart_simpson' has been added to system!
User 'maggy_simpson' has been added to system!


Code:
root@nio:/tmp# tail -2 /etc/passwd
bart_simpson:x:1001:1002::/home/bart_simpson:/bin/sh
maggy_simpson:x:1002:1003::/home/maggy_simpson:/bin/sh

---------- Post updated at 02:11 AM ---------- Previous update was at 02:02 AM ----------

Test
Code:
akshay@nio:/tmp$ su bart_simpson
Password: andHisPassword
$ whoami
bart_simpson

This User Gave Thanks to Akshay Hegde For This Post:
Roggy
 

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LEARN ABOUT DEBIAN

mailer

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

NAME

       mailer - script to warn users about their weak passwords

SYNOPSIS

       mailer password-files

DESCRIPTION

       This  manual  page  documents  briefly  the mailer command, which is part of the john package.  This manual page was written for the Debian
       GNU/Linux distribution because the original program does not have a manual page.  john, better known as John the Ripper, is a tool to  find
       weak passwords of users in a server.
       The mailer tool is useful to inform users which have been found to be using weak passwords by mail.

       You  should edit the message mailer will send to the users, but remember to copy the script to a safe place before editing it, as it's gen-
       erally a bad idea to modify things living in /usr.

SEE ALSO

       john(8), unafs(8), unique(8), unshadow(8).

       The programs are documented fully by John's documentation, which should be available in /usr/share/doc/john or other location, depending on
       your system.

AUTHOR

       This manual page was written by Jordi Mallach <jordi@debian.org>, for the Debian GNU/Linux system (but may be used by others).
       John the Ripper and mailer were written by Solar Designer <solar@openwall.com>. The complete list of contributors can be found in the CRED-
       ITS file in the documentation directory.

john								   June 03, 2004							 MAILER(8)
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