[LINUX] Change MariaDB port number

The method of changing the port number for MariaDB installed on the Linux server is described below.

Service outage

Stop the service before changing the settings.

$ sudo systemctl stop mariadb

Change configuration file

As a precaution, it is recommended to create a backup file for the configuration file.

$ sudo cp /etc/my.cnf.d/server.conf /etc/my.conf.d/server_bk.conf

Open the config file

$ sudo vi /etc/my.cnf.d/server.cnf

Add a sentence to specify the port number at the end of the opened file.

port=Arbitrary port number

Service start

After specifying the port, start the service.

$ sudo systemctl start mariadb

Check port settings

Log in to MariaDB and check with the following SQL. OK if the [3306] part is the specified arbitrary port number

mysql > show variables like 'port'

+---------------+-------+
| Variable_name | Value |
+---------------+-------+
| port          | 3306  |
+---------------+-------+

that's all