#!/bin/bash

USERID="$1"

create_user_and_group() {
	groupadd $USERID
	useradd -g $USERID -s /bin/bash -d /home/$USERID -m $USERID
	chmod o-rwx /home/$USERID
	passwd $USERID
	echo "User and group succesfully created"
}

/bin/id $USERID &> /dev/null
USER_EXIST=$?
/bin/id -g $USERID &> /dev/null
GROUP_EXIST=$?
[ $USER_EXIST -ne 0 -a $GROUP_EXIST -ne 0 ] && create_user_and_group || echo "User or group already exists"