Adding new users to a Linux system
#!/bin/bash
2# Script to add a user to Linux system
3if [ $(id -u) -eq 0 ]; then
4    read -p "Enter username : " username
5    read -s -p "Enter password : " password
6    egrep "^$username" /etc/passwd >/dev/null
7    if [ $? -eq 0 ]; then
8        echo "$username exists!"
9        exit 1
10    else
11        pass=$(perl -e 'print crypt($ARGV[0], "password")' $password)
12        useradd -m -p $pass $username
13        [ $? -eq 0 ] && echo "User has been added to system!" || echo "Failed to add a user!"
14    fi
15else
16    echo "Only root may add a user to the system"
17    exit 2

18fi