MySQL

http://telegra.ph/php-installation-02-23

sudo apt install -y mysql-server mysql-client
sudo mysql_secure_installation 

magento@magento-VirtualBox1:~$ sudo gedit /etc/mysql/mysql.cnf

create database magento;
GRANT ALL ON magento.* TO magento@localhost IDENTIFIED BY 'magento'; 

NTP Installation

apt-get install ntp

Configure PHP and check it using /var/www/html and create a file called phpinfo.php

<?php

phpinfo();

?>

time to install COMPOSER

curl -sS https://getcomposer.org/installer | php
mv composer.phar /usr/local/bin/composer