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How to Install MySQL on Ubuntu 18.04

MySQL is the most popular open-source relational database management system. It is fast, easy to use, scalable, and an integral part of the popular LAMP and LEMP stacks.

In this tutorial we will show you how to install and secure MySQL on a Ubuntu 18.04 machine.

Prerequisites

Before continuing with this tutorial, make sure you are logged in as a user with sudo privileges.

Installing MySQL on Ubuntu

At the time of writing this article, the latest version of MySQL available from the official Ubuntu repositories is MySQL version 5.7.

To install MySQL on your Ubuntu server follow the steps below:

  1. First update the apt package index by typing:

    sudo apt update
  2. Then install the MySQL package with the following command:

    sudo apt install mysql-server
  3. Once the installation is completed, the MySQL service will start automatically. To check whether the MySQL server is running, type:

    sudo systemctl status mysql
    ● mysql.service - MySQL Community Server
       Loaded: loaded (/lib/systemd/system/mysql.service; enabled; vendor preset: enabled)
       Active: active (running) since Wed 2018-06-20 11:30:23 PDT; 5min ago
     Main PID: 17382 (mysqld)
        Tasks: 27 (limit: 2321)
       CGroup: /system.slice/mysql.service
               `-17382 /usr/sbin/mysqld --daemonize --pid-file=/run/mysqld/mysqld.pid

Securing MySQL

MySQL server package comes with a script called mysql_secure_installation that can perform several security related operations.

Run the script by typing:

sudo mysql_secure_installation

You will be asked to configure the VALIDATE PASSWORD PLUGIN which is used to test the strength of the MySQL users passwords and improve the security. There are three levels of password validation policy, low, medium and strong. Press ENTER if you don’t want to set up the validate password plugin.

On the next prompt you will be asked to set a password for the MySQL root user. Once you do that the script will also ask you to remove the anonymous user, restrict root user access to the local machine and remove the test database. You should answer “Y” (yes) to all questions.

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Login as root

To interact with the MySQL server from the command line you can use the MySQL client utility which is installed as a dependency of the MySQL server package.

In Ubuntu systems running MySQL 5.7 (and later), the root user is authenticated by the auth_socket plugin by default.

The auth_socket plugin authenticates users that connect from the localhost through the Unix socket file. This means that you can’t authenticate as a root by providing a password.

To log in to the MySQL server as the root user type:

sudo mysql

You will be presented with the mysql shell as shown below:

Welcome to the MySQL monitor.  Commands end with ; or \g.
Your MySQL connection id is 8
Server version: 5.7.22-0ubuntu18.04.1 (Ubuntu)

Copyright (c) 2000, 2018, Oracle and/or its affiliates. All rights reserved.

Oracle is a registered trademark of Oracle Corporation and/or its
affiliates. Other names may be trademarks of their respective
owners.

Type 'help;' or '\h' for help. Type '\c' to clear the current input statement.

If you want to login to your MySQL server as a root from an external program such as phpMyAdmin you have two options.

The first one is to change the authentication method from auth_socket to mysql_native_password. You can do that by running the following command:

ALTER USER 'root'@'localhost' IDENTIFIED WITH mysql_native_password BY 'very_strong_password';
FLUSH PRIVILEGES;

The second, recommended option is to create a new administrative user with access to all databases:

GRANT ALL PRIVILEGES ON *.* TO 'administrator'@'localhost' IDENTIFIED BY 'very_strong_password';

Conclusion

Now that your MySQL server is up and running and you know how to connect to the MySQL server from the command line, you might want to check the following guides:

This post is a part of the how-to-install-lemp-stack-on-ubuntu-18-04 series.
Other posts in this series:

How to Install MySQL on Ubuntu 18.04