user@user:~$ sudo mysql_secure_installation [sudo] user のパスワード: Securing the MySQL server deployment. Connecting to MySQL using a blank password. VALIDATE PASSWORD COMPONENT can be used to test passwords and improve security. It checks the strength of password and allows the users to set only those passwords which are secure enough. Would you like to setup VALIDATE PASSWORD component? Press y|Y for Yes, any other key for No:VALIDATEP PASSWORDコンポーネントをセットアップしますか？
→ "y"
There are three levels of password validation policy: LOW Length >= 8 MEDIUM Length >= 8, numeric, mixed case, and special characters STRONG Length >= 8, numeric, mixed case, special characters and dictionary file Please enter 0 = LOW, 1 = MEDIUM and 2 = STRONG:パスワード検証ポリシーを選択
STRONGが最も強力だが、今回は面倒なので"LOW"(0)を選択
Please set the password for root here. New password: Re-enter new password: Estimated strength of the password: 50 Do you wish to continue with the password provided?(Press y|Y for Yes, any other key for No) :パスワード強度は 50 とのこと。
問題ないので "y" で続行
Do you wish to continue with the password provided?(Press y|Y for Yes, any other key for No) : y 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? (Press y|Y for Yes, any other key for No) :匿名ユーザーを削除するか？ "y" を入力
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? (Press y|Y for Yes, any other key for No) :リモートからのrootログインを禁止するか？
本当は"y"が良いと思われるが、今回はテストなので "n" を入力
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? (Press y|Y for Yes, any other key for No) :"test"データベースを削除するか？
使わないので "y" を入力
Reloading the privilege tables will ensure that all changes made so far will take effect immediately. Reload privilege tables now? (Press y|Y for Yes, any other key for No) :特権テーブルを今すぐ再ロードするか？
どちらでも良さそう。"y" を入力
これで終了
SSHでMySQLにrootで接続してみる。
user@user:~$ sudo mysql -u root -p [sudo] user のパスワード: Enter password: Welcome to the MySQL monitor. Commands end with ; or \g. Your MySQL connection id is 12 Server version: 8.0.20-0ubuntu0.20.04.1 (Ubuntu) Copyright (c) 2000, 2020, 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>
※ mysqlコマンドは "sudo" を付けないと実行できない
技術メモ, Linux, Ubuntu, MySQL
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