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2021 Jan. 10.
パッケージをインストール
# apt update && apt install mariadb-server mariadb-client ## mariadbの稼働確認 # systemctl status mariadb.service
パッケージインストール直後の設定
$ su - # mysql_secure_installation In order to log into MariaDB to secure it, we'll need the current password for the root user. If you've just installed MariaDB, 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 MariaDB root user without the proper authorisation. Set root password? [Y/n] n ## ubuntuではパスワード認証ではなくunix socket認証になっているので、n を入力し、パスワード設定しなくてよい ... Skipping. By default, a MariaDB installation has an anonymous user, allowing anyone to log into MariaDB 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, MariaDB 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 MariaDB installation should now be secure. Thanks for using MariaDB!
バージョン確認、接続確認
# mysqladmin version mysqladmin Ver 9.1 Distrib 10.3.25-MariaDB, for debian-linux-gnu on x86_64 Copyright (c) 2000, 2018, Oracle, MariaDB Corporation Ab and others. Server version 10.3.25-MariaDB-0ubuntu0.20.04.1 Protocol version 10 Connection Localhost via UNIX socket UNIX socket /var/run/mysqld/mysqld.sock Uptime: 25 min 6 sec Threads: 7 Questions: 473 Slow queries: 0 Opens: 177 Flush tables: 1 Open tables: 31 Queries per second avg: 0.314
UNIX socket接続でのrootユーザーログイン
## linuxシステムのrootユーザーがmariadbのrootユーザー ## ログインパスワード入力不要 # mysql MariaDB [(none)]> status -------------- mysql Ver 15.1 Distrib 10.3.25-MariaDB, for debian-linux-gnu (x86_64) using readline 5.2 Connection id: 58 Current database: Current user: root@localhost SSL: Not in use Current pager: stdout Using outfile: '' Using delimiter: ; Server: MariaDB Server version: 10.3.25-MariaDB-0ubuntu0.20.04.1 Ubuntu 20.04 Protocol version: 10 Connection: Localhost via UNIX socket Server characterset: utf8mb4 Db characterset: utf8mb4 Client characterset: utf8mb4 Conn. characterset: utf8mb4 UNIX socket: /var/run/mysqld/mysqld.sock Uptime: 28 min 52 sec Threads: 7 Questions: 477 Slow queries: 0 Opens: 177 Flush tables: 1 Open tables: 31 Queries per second avg: 0.275 -------------- MariaDB [(none)]> show grants for root@localhost; +---------------------------------+ | Grants for root@localhost | +---------------------------------+ | GRANT ALL PRIVILEGES ON *.* TO `root`@`localhost` IDENTIFIED VIA unix_socket USING '*xxx' WITH GRANT OPTION | | GRANT PROXY ON ''@'%' TO 'root'@'localhost' WITH GRANT OPTION | +---------------------------------+ 2 rows in set (0.001 sec) > select user,host,password from mysql.user; +------+-----------+-------------+ | user | host | password | +------+-----------+-------------+ | root | localhost | *xxxxxxx | +------+-----------+-------------+ MariaDB [(none)]> show databases; +--------------------+ | Database | +--------------------+ | information_schema | | mysql | | performance_schema | +--------------------+ MariaDB [(none)]> show variables like "char%"; +--------------------------+----------------------------+ | Variable_name | Value | +--------------------------+----------------------------+ | character_set_client | utf8mb4 | | character_set_connection | utf8mb4 | | character_set_database | utf8mb4 | | character_set_filesystem | binary | | character_set_results | utf8mb4 | | character_set_server | utf8mb4 | | character_set_system | utf8 | | character_sets_dir | /usr/share/mysql/charsets/ | +--------------------------+----------------------------+ MariaDB [(none)]> show variables like "colla%"; +----------------------+--------------------+ | Variable_name | Value | +----------------------+--------------------+ | collation_connection | utf8mb4_general_ci | | collation_database | utf8mb4_general_ci | | collation_server | utf8mb4_general_ci | +----------------------+--------------------+
MariaDB [(none)]> exit;