bash commend to run after installing a fresh vm on a cloud serviceprovider

init.sh

#!/bin/bash

read -p "Enter your ip: " IP
read -p "Enter your hostname: (myserver) " HOSTNAME
read -p "Enter your domainname: (domain.com) " DOMAIN
FQDN=$HOSTNAME.$DOMAIN

# Update the system
apt-get update
apt-get upgrade -y

# Update hostname and hosts
printf ${HOSTNAME} > /etc/hostname
printf "127.0.0.1	${FQDN}	${HOSTNAME} localhost localhost.localdomain\n\
${IP}	${FQDN}	${HOSTNAME}\n\
127.0.1.1	${FQDN}	${HOSTNAME}\n" > /etc/hosts

# Update Locals
read -p "Enter local: (nl_BE.UTF-8) " LOCAL
export LANGUAGE=$LOCAL
export LANG=$LOCAL
export LC_ALL=$LOCAL
locale-gen $LOCAL
dpkg-reconfigure locales

# Update firewall
ufw allow 22 # ssh
ufw enable

# Create admin used
read -p "Do you want to create a sudo user? " CREATE_USER
case "$CREATE_USER" in
  [jJyY]*)
    mkdir /etc/skel/.ssh && cp .ssh/authorized_keys /etc/skel/.ssh/authorized_keys
    read -p "Enter username: " USERNAME
    adduser $USERNAME
    usermod -aG admin,sudo $USERNAME
    
    # Update sshd (disable root login if admin user is created)    
    sed -i -e 's/PermitRootLogin yes/PermitRootLogin no/g' /etc/ssh/sshd_config
    ;;
esac

# Update sshd
sed -i -e 's/PasswordAuthentication yes/PasswordAuthentication no/g' /etc/ssh/sshd_config
service ssh restart

# reboot machine
reboot