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MariaDB 10.3 : Install2021/03/15

Install MariaDB to configure Database Server.
[1] Install MariaDB.
[root@www ~]#
dnf module -y install mariadb:10.3
[root@www ~]#
vi /etc/my.cnf.d/charset.cnf
# create new

# set default charaset

# if not set, default is [latin1]

# for the case of 4 bytes UTF-8, specify [utf8mb4]

character-set-server = utf8mb4

default-character-set = utf8mb4

[root@www ~]#
systemctl enable --now mariadb

[2] If Firewalld is running and also you allow to access MariaDB Server from remote Hosts, allow service. MariaDB uses [3306/TCP].
[root@www ~]#
firewall-cmd --add-service=mysql --permanent

[root@www ~]#
firewall-cmd --reload

[3] Initial Settings for MariaDB.
[root@www ~]#


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
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
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
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
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
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!

# connect to MariaDB with root

[root@www ~]#
mysql -u root -p

Enter password:    
# password you set

Welcome to the MariaDB monitor.  Commands end with ; or \g.
Your MariaDB connection id is 17
Server version: 10.3.11-MariaDB MariaDB Server

Copyright (c) 2000, 2018, Oracle, MariaDB Corporation Ab and others.

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

# show user list
MariaDB [(none)]> select user,host,password from mysql.user; 
| user | host      | password                                  |
| root | localhost | *xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx |
| root | | *xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx |
| root | ::1       | *xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx |
3 rows in set (0.000 sec)

# show database list
MariaDB [(none)]> show databases; 
| Database           |
| information_schema |
| mysql              |
| performance_schema |
3 rows in set (0.00 sec)

# create test database
MariaDB [(none)]> create database test_database; 
Query OK, 1 row affected (0.000 sec)

# create test table on test database
MariaDB [(none)]> create table test_database.test_table (id int, name varchar(50), address varchar(50), primary key (id)); 
Query OK, 0 rows affected (0.108 sec)

# insert data to test table
MariaDB [(none)]> insert into test_database.test_table(id, name, address) values("001", "CentOS", "Hiroshima"); 
Query OK, 1 row affected (0.036 sec)

# show test table
MariaDB [(none)]> select * from test_database.test_table; 
| id | name   | address   |
|  1 | CentOS | Hiroshima |
1 row in set (0.000 sec)

# delete test database
MariaDB [(none)]> drop database test_database; 
Query OK, 1 row affected (0.111 sec)

MariaDB [(none)]> exit
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