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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

srptool

srptool(1)						      General Commands Manual							srptool(1)

NAME

       srptool - Simple SRP password tool

SYNOPSIS

       srptool [options]

DESCRIPTION

       Very simple program that emulates the programs in the Stanford SRP (Secure Remote Password) libraries using GnuTLS.  It is intended for use
       in places where you don't expect SRP authentication to be the used for system users.

       In brief, to use SRP you need to create two files. These are the password file that holds the users and the verifiers associated with  them
       and the configuration file to hold the group parameters (called tpasswd.conf).

OPTIONS

       --bits BITS
	      specify the number of bits for prime numbers (used only when the --create-conf option is used).

       --create-conf FILE
	      Generate a tpasswd.conf file.

       -h, --help
	      Prints a short reminder of the command line options.

       -i, --index INDEX
	      Specify the index of the parameters in tpasswd.conf to use.

       -p, --passwd FILE
	      Specify a password file.

       -c, --passwd-conf FILE
	      Specify a password configuration file.

       -s, --salt SALT
	      Specify salt size for crypt algorithm.

       -u, --username username
	      Specify username.

       --verify
	      Just verify password.

EXAMPLES

       To create tpasswd.conf which holds the g and n values for SRP protocol (generator and a large prime), run:

	      $ srptool --create-conf /etc/tpasswd.conf

       This  command will create /etc/tpasswd and will add user 'test' (you will also be prompted for a password). Verifiers are stored by default
       in the way libsrp expects.

	      $ srptool --passwd /etc/tpasswd 
		  --passwd-conf /etc/tpasswd.conf -u test

       This command will check against a password. If the password matches the one in /etc/tpasswd you will get an ok.

	      $ srptool --passwd /etc/tpasswd 
		  --passwd-conf /etc/tpasswd.conf --verify -u test

AUTHOR

       Nikos Mavrogiannopoulos <nmav@gnutls.org> and others; see /usr/share/doc/gnutls-bin/AUTHORS for a complete list.

       This manual page was written by Ivo Timmermans <ivo@debian.org>, for the Debian GNU/Linux system (but may be used by others).

								February 21st 2005							srptool(1)
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