Instalar o servidor de base de dados MySQL MariaDB, com uma configuração mínima.

root@server:~# apt-get install mariadb-server mariadb-client

Durante o processo de instalação é pedida a password de root do servidor MariaDB. Este utilizador root é específico do MariaDB, pelo que deve ter uma password diferente do root do sistema.

E a sua confirmação:

Por segurança e melhor compatibilidade, a configuração predefinida do MariaDB aceitará apenas ligações locais (endereço 127.0.0.1). Caso se pretenda aceder ao servidor MariaDB a partir da rede interna, podemos substituir o bind-address pelo endereço do nosso servidor (192.168.1.100), no ficheiro e configuração /etc/mysql/my.cnf.

/etc/mysql/my.cnf

# [...]
# Instead of skip-networking the default is now to listen only on
# localhost which is more compatible and is not less secure.
bind-address            = 127.0.0.1
# [...]

A partir deste momento será possível aceder ao monitor do MariaDB:

root@server:~# mysql -u root -p
Enter password:
Welcome to the MariaDB monitor.  Commands end with ; or \g.
Your MariaDB connection id is 40
Server version: 10.0.16-MariaDB-1 (Debian)
 
Copyright (c) 2000, 2014, Oracle, MariaDB Corporation Ab and others.
 
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 (0.01 sec)
 
MariaDB [(none)]> quit;
Bye
root@server:~#

Após a instalação é conveniente garantir a segurança da instalação MariaDB com o comando mysql_secure_installation. Este programa permite, entre outras coisas, alterar password da conta root do MariaDB, desligar alguns acessos externos e apagar as bases de dados de testes.

root@server:~# 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.
 
You already have a root password set, so you can safely answer 'n'.
 
Change the root password? [Y/n] n
 ... skipping.
 
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]
 ... 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]
 ... 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]
 - Dropping test database...
ERROR 1008 (HY000) at line 1: Can`t drop database 'test'; database doesn`t exist
 ... Failed!  Not critical, keep moving...
 - 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]
 ... 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!
root@server:~#

• MariaDB
• Wikipedia (pt): MariaDB
• Wikipedia (en): MariaDB
• mysql_secure_installation
• Release Notes for Debian 8 (jessie), 64-bit PC - 2.2.6. MariaDB next to MySQL