MySQLのインストール

カテゴリ:データベース

yumコマンドでMySQLをインストールします。
# yum -y install mysql-server
CentOS 7 以降の場合:(リポジトリの追加が必要)
# rpm -ivh http://dev.mysql.com/get/mysql57-community-release-el7-8.noarch.rpm
# yum -y install mysql-community-server
MySQLの自動起動を有効にします。
# chkconfig mysqld on
CentOS 7 以降の場合:
# systemctl enable mysqld
MySQLを開始すると自動でデータベースの初期化を行ってくれます。
# service mysqld start
MySQL データベースを初期化中:  Installing MySQL system tables...
OK
Filling help tables...
OK

To start mysqld at boot time you have to copy
support-files/mysql.server to the right place for your system

PLEASE REMEMBER TO SET A PASSWORD FOR THE MySQL root USER !
To do so, start the server, then issue the following commands:

/usr/bin/mysqladmin -u root password 'new-password'
/usr/bin/mysqladmin -u root -h localhost.localdomain password 'new-password'

Alternatively you can run:
/usr/bin/mysql_secure_installation

which will also give you the option of removing the test
databases and anonymous user created by default.  This is
strongly recommended for production servers.

See the manual for more instructions.

You can start the MySQL daemon with:
cd /usr ; /usr/bin/mysqld_safe &

You can test the MySQL daemon with mysql-test-run.pl
cd /usr/mysql-test ; perl mysql-test-run.pl

Please report any problems with the /usr/bin/mysqlbug script!

                                                           [  OK  ]
mysqld を起動中:                                           [  OK  ]
CentOS 7 以降の場合:
# systemctl start mysqld
但し、rootのパスワードが空であるため、このままではデータベースにログインできません。
# mysql -u root -p
Enter password:
ERROR 1045 (28000): Access denied for user 'root'@'localhost' (using password: NO)
初期設定のパスワードは以下のコマンドで確認できます。
このパスワードでrootでログインできます。
# cat /var/log/mysqld.log | grep root
2018-02-03T16:11:50.019952Z 1 [Note] A temporary password is generated for root@localhost: =!4#IMguhtLh
続けて以下を実行して、初期設定を実施します。
以下では、rootのパスワード設定の他、接続をlocalhostのみに制限したり、初期設定で存在するtestデータベースの削除を実施します。
# /usr/bin/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):
OK, successfully used password, moving on...

Setting the root password ensures that nobody can log into the MySQL
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] y
New password:
Re-enter new password:
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] 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? [Y/n] y
... 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] 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 now? [Y/n] y
... 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!
※もし上記を実行時にもrootのパスワードの入力時に「Access denied for user 'root'@'localhost'」が表示される場合、以下のようにオプションを付けて MySQL を起動しなおし、スクリプトを実行してください。
# service mysqld stop
# mysqld_safe --skip-grant-tables &
# /usr/bin/mysql_secure_installation
CentOS 7 以降の場合:
# systemctl stop mysqld
# mysqld_safe --skip-grant-tables &
# /usr/bin/mysql_secure_installation
※スクリプトの実行後はオプション無しで MySQL を再起動してください。

MySQLに接続できることを確認します。
以下のように"mysql>"が表示されればログイン成功です。

# mysql -u root -p
Enter password:
Welcome to the MySQL monitor.  Commands end with ; or \g.
Your MySQL connection id is 11
Server version: 5.1.73 Source distribution

Copyright (c) 2000, 2013, 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>
※終了するときは \q を入力します。

公開日時: 2014年07月20日  09:33:59

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