How to install MariaDB on CentOS 7 linux step by step guide

In this article we learn what is MariaDB and how to install MariaDB on CentOS 7 linux step by step.

What is MariaDB

MariaDB is one of the popular database server all over the world. MariaDB is free and open source database server which is drop-in replacement for MySQL. Mariadb is used because MariaDB is fast, reliable and robust database server.

Installation of MariaDB on CentOS 7

In this demonstration we install MariaDB on CentOS 7 using the default yum repositories. To install MariaDB on CentOS 7 we need to execute the below command.

#yum install mariadb-server mariadb

How to install MariaDB on CentOS 7 linux step by step guide

Start and enable MariaDB service on CentOS 7

To start and enable the MariaDB service on CentOS 7 we need to execute the below command.

#systemctl start mariadb

#systemctl enable mariadb

Setup firewall rule for MariaDB service on CentOS 7

CentOS 7 uses firewalld as a software firewall instead of iptables. By default MariaDB server is running on 3306 port. We need to allow this port into firewall rule to access it. To allow the incoming connection to the standard MySQL tcp port we need to execute the below command.

#firewall-cmd - -permanent - -add-service=mysql

#firewall-cmd -- reload

To secure MariaDB we use “mysql_secure_installation” .After executing the “mysql_secure_installation” command we need to set root password,remove test database, remove anonymous user login and disable the remote login.

#mysql_secure_installation

NOTE: RUNNING ALL PARTS OF THIS SCRIPT IS RECOMMENDED FOR ALL MariaDB

SERVERS IN PRODUCTION USE! PLEASE READ EACH STEP CAREFULLY!

In order to log into MariaDB to secure it, we'll need the current

password for the root user. If you've just installed MariaDB, and

you haven't set the root password yet, the password will be blank,

so you should just press enter here.

Enter current password for root (enter for none):

OK, successfully used password, moving on...

Setting the root password ensures that nobody can log into the MariaDB

root user without the proper authorisation.

Set root password? [Y/n] y

New password:

Re-enter new password:

Password updated successfully!

Reloading privilege tables..

... Success!

By default, a MariaDB installation has an anonymous user, allowing anyone

to log into MariaDB without having to have a user account created for

them. This is intended only for testing, and to make the installation

go a bit smoother. You should remove them before moving into a

production environment.

Remove anonymous users? [Y/n] y

... Success!

Normally, root should only be allowed to connect from 'localhost'. This

ensures that someone cannot guess at the root password from the network.

Disallow root login remotely? [Y/n] y

... Success!

By default, MariaDB comes with a database named 'test' that anyone can

access. This is also intended only for testing, and should be removed

before moving into a production environment.

Remove test database and access to it? [Y/n] y

- Dropping test database...

... Success!

- Removing privileges on test database...

... Success!

Reloading the privilege tables will ensure that all changes made so far

will take effect immediately.

Reload privilege tables now? [Y/n] y

... Success!

Cleaning up...

All done! If you've completed all of the above steps, your MariaDB

installation should now be secure.

Thanks for using MariaDB!

After that restart the service using the below command.

#systemctl restart mariadb

We can login the database using root user executing the below command and execute a simple query on database.

#mysql –u root –p

After that type the root password and enter the SQL promt.

[root@localhost ~]# mysql -uroot -p

Enter password:

Welcome to the MariaDB monitor. Commands end with ; or \g.

Your MariaDB connection id is 12

Server version: 5.5.60-MariaDB MariaDB Server

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

MariaDB [(none)]> show databases;

+--------------------+

| Database |

+--------------------+

| information_schema |

| mysql |

| performance_schema |

+--------------------+

3 rows in set (0.00 sec)

To change MariaDB port

Suppose we are going to change MariaDB port from 3306 to 7706,to change the default port we need to open /etc/my.cnf file and add the below line.

[mysqld]

Port = 7706

After that restart the service using the below command.

#systemctl restart mariadb

After that allow the firewall access for new port. To allow the access in firewall we execute the below commands.

#firewall-cmd -- permanent -- add-port=7706/tcp

#firewall-cmd -- reload

Recommended Read: https://techrideradmin.blogspot.com/2018/10/iptables-firewall-rule-chains-configuration-guide-on-linux-with-examples-for-beginners.html

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How to install MariaDB on CentOS 7 linux step by step guide