Setup script for virtual machines templates

setup.sh

#!/bin/bash
# Script to add a user to Linux system
# -------------------------------------------------------------------------
read -p "Enter username: " username
read -s -p "Enter password: " password
echo ""
sudo egrep "^$username" /etc/passwd >/dev/null
if [ $? -eq 0 ]; then
	echo "$username exists!"
	exit 1
else
	pass=$(perl -e 'print crypt($ARGV[0], "password")' $password)
	sudo useradd -d /home/$username -s /bin/bash -U -m -p $pass $username
	[ $? -eq 0 ] && echo "User has been added to system!" || echo "Failed to add a user!"
fi
sudo usermod -a -G sudo $username
read -p "Enter a hostname: " host
sudo cp /home/template/.bashrc.template "/home/$username/.bashrc"
sudo chown $username "/home/$username/.bashrc"
sudo rpl "template" "$host" /etc/hosts
sudo hostname $host
sudo rm /etc/ssh/ssh_host_*
sudo dpkg-reconfigure openssh-server
sudo userdel -r -f template
kill -HUP $PPID