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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 SUSE

unix2_chkpwd

UNIX2_CHKPWD(8) 						 Linux-PAM Manual						   UNIX2_CHKPWD(8)

NAME

       unix2_chkpwd - helper binary that verifies the password of the current user

SYNOPSIS

       /sbin/unix2_chkpwd servicename username

DESCRIPTION

       unix2_chkpwd  is  a  helper program for applications that verifies the password of the current user.  It is not intended to be run directly
       from the command line and logs a security violation if done so.

       It is typically installed setuid root or setgid shadow and called by applications, which only wishes to do  an  user  authentification  and
       nothing more.

OPTIONS

       unix2_pwdchk requires the following arguments:

       pam_service
	      The name of the service using unix2_chkpwd. This is required to be one of the services in /etc/pam.d

       username
	      The name of the user whose password you want to verify.

INPUTS

       unix2_pwdchk expects the password via stdin.

RETURN CODES

       unix2_chkpwd has the following return codes:

       1      unix2_chkpwd was inappropriately called from the command line or the password is incorrect.

       0      The password is correct.

HISTORY

       Written by Olaf Kirch loosely based on unix_chkpwd by Andrew Morgan

SEE ALSO

       pam(8)

AUTHOR

       Emily Ratliff.

Linux-PAM 0.76							    2003-03-21							   UNIX2_CHKPWD(8)
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