・Windows10(VMWare Workstation15 player)



sudo apt update
sudo apt upgrade



sudo apt install mysql-server mysql-client


mysql --version
mysql Ver 8.0.20-0ubuntu0.20.04.1 for Linux on x86_64 ((Ubuntu))


sudo service mysql status
● mysql.service - MySQL Community Server Loaded: loaded (/lib/systemd/system/mysql.service; enabled; vendor preset:> Active: active (running) since Mon 2020-06-29 19:52:29 PDT; 1min 30s ago Main PID: 10994 (mysqld) Status: "Server is operational" Tasks: 38 (limit: 4624) Memory: 326.4M CGroup: /system.slice/mysql.service └─10994 /usr/sbin/mysqld Jun 29 19:52:28 ubuntu systemd[1]: Starting MySQL Community Server... Jun 29 19:52:29 ubuntu systemd[1]: Started MySQL Community Server.


sudo mysql_secure_installation
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: 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: 0 Please set the password for root here. New password: *** Re-enter new password: *** Estimated strength of the password: 25 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) : 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? (Press y|Y for Yes, any other key for No) : 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? (Press y|Y for Yes, any other key for No) : 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? (Press y|Y for Yes, any other key for No) : y Success. All done!


sudo mysql -u root -p
Enter password: *** Welcome to the MySQL monitor. Commands end with ; or \g. Your MySQL connection id is 10 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. 






CREATE USER 'testuser'@'localhost' IDENTIFIED BY 'パスワード';


SELECT user, host FROM mysql.user;


ERROR 1819 (HY000): Your password does not satisfy the current policy requirements


SHOW VARIABLES LIKE 'validate_password%';


set global validate_password.length=6;
set global validate_password.policy=LOW;


GRANT ALL ON *.* TO 'testuser'@'localhost';


show grants for testuser@localhost;