MariaDB

apt install mariadb-server mariadb-client

# Check service status.

systemctl status mariadb

# Start service.

systemctl start mariadb

# Enable auto start.

systemctl enable mariadb

# Create custom configuration file.

nano -w /etc/mysql/mariadb.conf.d/70-custom.cnf

# And add this there.

[mysqld]
transaction_isolation="READ-COMMITTED"

# Start secure installation

mysql_secure_installation

1. Enter root password if you have one, or skip by pressing Enter with key authentication only.
2. Don’t switch to 'unix_socket' authentication because MariaDB is already using 'unix_socket' authentication.
3. Don’t change the root password, no need when using unix_socket authentication.
4. Next, you can press Enter to answer all remaining questions, which will remove anonymous user, disable remote root login and remove test database. This step is a basic requirement for MariaDB database security.

# Check MariaDB server version.

mariadb --version

# Test login

mariadb -u root

exit;