CentOS 7にMySQL Community Server 5.6をインストール


```console:
# wget http://repo.mysql.com/mysql-community-release-el7.rpm
# rpm -ivh mysql-community-release-el7.rpm 
# rm -f mysql-community-release-el7.rpm 
# yum -y install mysql-community-server
# cp -p /etc/my.cnf /etc/my.cnf.org
# vi /etc/my.cnf
# diff /etc/my.cnf /etc/my.cnf.org 
32,34d31
< 
< [mysqld]
< character-set-server=utf8
# systemctl list-unit-files --type=service | grep mysqld
mysqld.service                         enabled 
# systemctl start mysqld
# systemctl list-units --type=service | grep mysqld
mysqld.service                     loaded active running MySQL Community Server
# mysql --version
mysql  Ver 14.14 Distrib 5.6.22, for Linux (x86_64) using  EditLine wrapper
# mysql_secure_installation 



NOTE: RUNNING ALL PARTS OF THIS SCRIPT IS RECOMMENDED FOR ALL MySQL
      SERVERS IN PRODUCTION USE!  PLEASE READ EACH STEP CAREFULLY!

In order to log into MySQL to secure it, we'll need the current
password for the root user.  If you've just installed MySQL, 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): ←空Enter
OK, successfully used password, moving on...

Setting the root password ensures that nobody can log into the MySQL
root user without the proper authorisation.

Set root password? [Y/n] ←空Enter
New password: ←任意のパスワードを入力
Re-enter new password: ←同じパスワードを再入力
Password updated successfully!
Reloading privilege tables..
 ... Success!


By default, a MySQL installation has an anonymous user, allowing anyone
to log into MySQL 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] ←空Enter
 ... 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] ←空Enter
 ... Success!

By default, MySQL 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] ←空Enter
 - 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] ←空Enter
 ... Success!




All done!  If you've completed all of the above steps, your MySQL
installation should now be secure.

Thanks for using MySQL!


Cleaning up...
# mysql -u root -p
Enter password: ←上記で設定したパスワードを入力
Welcome to the MySQL monitor.  Commands end with ; or \g.
Your MySQL connection id is 15
Server version: 5.6.22 MySQL Community Server (GPL)

Copyright (c) 2000, 2014, Oracle and/or its affiliates. All rights reserved.

Oracle is a registered trademark of Oracle Corporation and/or its
affiliates. Other names may be trademarks of their respective
owners.

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

mysql> 
```