MariaDB

murado — 2015-10-25 10:10:08 UTC

MariaDB is an open source, multi-threaded relational database management system, backward compatible replacement for MySQL. It is maintained and developed by the MariaDB Foundation including some of the original developers of the MySQL.

Installing MariaDB on Ubuntu 18.04
At the time of writing this article, MariaDB version 10.1 is included in the Ubuntu main repositories.

To install MariaDB on Ubuntu 18.04, follow these steps:

# apt update

# apt install mariadb-server

The MariaDB service will start automatically.

# systemctl status mariadb

check the MariaDB:
# mysql -V

Securing MariaDB
Run the mysql_secure_installation command to improve the security of the MariaDB installation:

# mysql_secure_installation

*The script will prompt you to set up the root user password, remove the anonymous user, restrict root user access to the local machine and remove the test database. At the end the script will reload the privilege tables ensuring that all changes take effect immediately.

All steps are explained in detail and it is recommended to answer “Y” (yes) to all questions.

Connect to MariaDB from the command line

To connect to the MariaDB server through the terminal we can use the MariaDB client.

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

mysql -u root -p

You will be prompted to enter the root password you have previously set when the mysql_secure_installation script was run.

Once you enter the password you will be presented with the MariaDB shell as shown below:

Welcome to the MariaDB monitor.  Commands end with ; or \g.
Your MariaDB connection id is 49
Server version: 10.1.29-MariaDB-6 Ubuntu 18.04

Copyright (c) 2000, 2017, Oracle, MariaDB Corporation Ab and others.

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

If you prefer a web interface over command line, you can install phpMyAdminand manage your MariaDB databases and users through it.

How to manage MySQL user accounts and databases

Manage MySQL Databases and Users

murado — 2019-07-27 11:47:39 UTC

MySQL is the most popular open-source relational database management system. MySQL server allows us to create numerous users and databases and grant appropriate privileges so that users can access and manage databases.

Use command line to create and manage MySQL or MariaDB databases and users.

To open the MySQL prompt(enter the MySQL root user password)

mysql -u root -p

Create a new MySQL database

CREATE DATABASE database_name;

List all MySQL databases

SHOW DATABASES;

Create a new MySQL user account
A user account in MySQL consists of a user name and host name parts.

CREATE USER 'username'@'localhost' IDENTIFIED BY 'user_password';

In the command above we have set the hostname part to localhost which means that this user will be able to connect to the MySQL server only from the localhost ( i.e from the system where MySQL Server runs).

If you want to grant access from another host(s) just change the localhost with the remote machine IP or use '%' wildcard for the host part, which means that the user account will be able to connect from any host.

Change a MySQL user account password

ALTER USER 'username'@'localhost' IDENTIFIED BY 'new_password';

List all MySQL user accounts

SELECT user, host FROM mysql.user;

Delete MySQL user account

DROP USER 'username@'localhost';

Grant permissions to a MySQL user account

There are multiple types of privileges that can be granted to a user account. You can find a full list of privileges supported by MySQL here. In this guide we will go through several examples:

GRANT ALL PRIVILEGES ON database_name.* TO 'username'@'localhost';

If you want to grant only specific privileges to a user account over a specific database type:

GRANT SELECT, INSERT, DELETE ON database_name.* TO 'username@'localhost';

Revoke permissions from a MySQL user account

If you need to revoke one or more privileges or all privileges from a user account, the syntax is almost identical to granting it. For example, if you want to revoke all privileges from a user account over a specific database, use the following command:

REVOKE ALL PRIVILEGES ON database_name.* TO 'database_user'@'localhost';

Display MySQL user account privileges

To find the privilege(s) granted to a specific MySQL user account type:

SHOW GRANTS FOR 'username'@'localhost';

12_MariaDB by Murad Isa

MariaDB

Manage MySQL Databases and Users