Managing user's in Linux using script

1. Simple Script to add multiple users in one go.

#!/bin/bash

filename="userslist.txt"  #< contains list of user's 

while read -r username

do

   name=$username

   echo "User created : " $username

   useradd $username

done < $filename

2. Simple script to provide a password to the list of user’s in one go.

#!/bin/bash

filename="userslist.txt" 

password="redhat"    #< provide password of your choice

while read -r username

do 

  name=$username

  echo "password provided for user :" $username

  echo "$password" | passwd $username --stdin  

done < $filename

3. Simple script to change the shell of the bulk of user’s in one go.

#!/bin/bash

filename="userslist.txt"  #< contains list of user's whose shell going to change

while read -r username

do 

  name=$username

  echo "changing shell for user :" $username

  chsh -s /sbin/nologin $username   #< provide the shell you want to change to.

done < $filename