1. Update the package index on your server
sudo apt-get update
2. Install the package
sudo apt-get install mysql-server
3. Run the included security script. This changes some of the less secure default options for things like remote root logins and sample users.
sudo mysql_secure_installation
4. If you're using a version of MySQL earlier than 5.7.6, you should initialize the data directory by running command below.
sudo mysql_install_db