new_linux_user.sh

#!/bin/bash
########################################################################
# Create new user and remove existing default user.
# Functions:
# - Create a new user. REMEMBER TO CHANGE THE PASSWORD!
# - Copy existing .ssh folder to new user
# - Change owner to new user
# - Delete default user (ubuntu in ec2 plain images)
# 
# Variables to change:
# - username
# - password
# - userToRemove
########################################################################
if [ $(id -u) -eq 0 ]; then
	username="paul"
	password="changeme"
	if [ -z "$(getent passwd $username)"]; then
		pass=$(perl -e 'print crypt($ARGV[0], "password")' $password)
		useradd -p $pass -m -s /bin/bash $username
		if [ $? -eq 0 ]; then
			echo "User has been added to system!"
			echo "Giving sudo access to $username"
			usermod -a -G admin $username
			userToRemove="ubuntu"
			if [ -z "$(getent passwd $userToRemove)"]; then
				echo "$userToRemove user doesn't exist. Not copying .ssh folder"
			else
				echo "Copying .ssh folder from $userToRemove user to $username"
				cp -R /home/$userToRemove/.ssh /home/$username/
				echo "Changing owner $username:$username /home/$username/.ssh"
				chown -R $username:$username /home/$username/.ssh
				echo "Deleting user $userToRemove"
				userdel $userToRemove
				if [ $? -eq 0 ]; then
					echo "User removed successfuly"
					echo "Removing home folder for $userToRemove user"
					rm -rf /home/$userToRemove
				else
					echo "Couldn't remove user"
				fi
			fi
		else	
			echo "Failed to add a user!"
		fi
	else
		echo "$username exists!"
		#exit 1
	fi
else
	echo "Only root may add a user to the system"
	#exit 2
fi