CentOS 6
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Install MariaDB 10.1
2016/08/08
 
Install MariaDB 10.1 to configure Database Server.
[1] It's possible to install from CentOS SCLo Software Collections.
It's OK to install it even if Other MySQL or MariaDB is already installed because MariaDB 10.1 is located on another PATH.
# install from SCLo

[root@www ~]#
yum --enablerepo=centos-sclo-rh -y install rh-mariadb101-mariadb-server
[2] Packages from Software Collections are installed uder the /opt directory.
To use it, Load environment variables like follows.
# load environment variables

[root@www ~]#
scl enable rh-mariadb101 bash
[root@www ~]#
mysql -V

mysql Ver 15.1 Distrib 10.1.14-MariaDB, for Linux (x86_64) using EditLine wrapper
[root@www ~]#
which mysql

/opt/rh/rh-mariadb101/root/usr/bin/mysql
[3] To enable MariaDB 10.1 automatically at login time, configure like follows.
[root@www ~]#
vi /etc/profile.d/rh-mariadb101.sh
# create new

#!/bin/bash

source /opt/rh/rh-mariadb101/enable
export X_SCLS="`scl enable rh-mariadb101 'echo $X_SCLS'`"
[4] Enable MariaDB 10.1 and Configure initial settings.
[root@www ~]#
vi /etc/opt/rh/rh-mariadb101/my.cnf.d/mariadb-server.cnf
# add follows within [mysqld] section

[mysqld]
character-set-server=utf8
[root@www ~]#
/etc/rc.d/init.d/rh-mariadb101-mariadb start

[root@www ~]#
chkconfig rh-mariadb101-mariadb on

[root@www ~]#
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

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:    
# MariaDB root password

Welcome to the MariaDB monitor.  Commands end with ; or \g.
Your MariaDB connection id is 11
Server version: 10.1.14-MariaDB MariaDB Server

Copyright (c) 2000, 2016, Oracle, MariaDB Corporation Ab and others.

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

MariaDB [(none)]>
select user,host,password from mysql.user; 

+------+-----------+-------------------------------------------+
| user | host      | password                                  |
+------+-----------+-------------------------------------------+
| root | localhost | ***************************************** |
| root | 127.0.0.1 | ***************************************** |
| root | ::1       | ***************************************** |
+------+-----------+-------------------------------------------+
3 rows in set (0.00 sec)
# display database list

MariaDB [(none)]>
show databases; 

+--------------------+
| Database           |
+--------------------+
| information_schema |
| mysql              |
| performance_schema |
+--------------------+
3 rows in set (0.01 sec)
MariaDB [(none)]>
exit

Bye
[5] If IPTables is running and also MariaDB is used from remote Hosts, allow port like follows. MariaDB uses 3306/TCP.
[root@www ~]#
iptables -I INPUT 5 -p tcp -m state --state NEW -m tcp --dport 3306 -j ACCEPT
 
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