MySQLでデータベースを作ろう！

ここでは、MySQLのインストール手順を掲載しています。

※CentOS 5のサポートは2017年3月をもって終了していますが、旧コンテンツとしてこちらのページは残しておきます。

[広告]

MySQLとは…？

MySQLはオープンソースで開発されているデータベースです。

MySQLのインストール

[root@co5 ~]# yum -y install mysql-server

Installed:
  mysql-server.x86_64 0:5.0.95-5.el5_9

Dependency Installed:
  perl-DBD-MySQL.x86_64 0:3.0007-2.el5

Complete!

インストールが完了したら、設定ファイルに、以下(赤字)を追記します。

[root@co5 ~]# cp -p /etc/my.cnf /etc/my.cnf.old

[root@co5 ~]# vi /etc/my.cnf

[mysqld]

default-character-set = utf8

[mysqld_safe]

MySQLの起動

それでは、起動をしてみます。

[root@co5 ~]# /etc/rc.d/init.d/mysqld start

The latest information about MySQL is available on the web at
http://www.mysql.com
Support MySQL by buying support/licenses at http://shop.mysql.com
                                                           [  OK  ]
mysqld を起動中:                                           [  OK  ]

自動起動の設定も行います。

[root@co ~]# chkconfig mysqld on

[root@co ~]# chkconfig --list mysqld

mysqld          0:off   1:off   2:on    3:on    4:on    5:on    6:off

MySQLの初期設定

MySQLの初期設定を行います。

途中、パスワード入力を求められますが、これはMySQLの管理者ユーザ(root)のパスワードです。CentOSのrootユーザではないので、注意してください。

パスワードは自由に決めることができます。

[root@co5 ~]# 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): [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] [Enter]
New password: [MySQLのrootパスワード]
Re-enter new password: [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] [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] [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] [Enter]
 - 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 now? [Y/n] [Enter]
 ... Success!

Cleaning up...



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

Thanks for using MySQL!

以上で設定完了。以後、必要に応じてデータベースを作成していきます。