MySQL 8.4 : Install2025/01/31

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Server version: 8.4.2 Source distribution

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# authentication method of root user is [auth_socket]
mysql> select user,host,plugin from mysql.user; 
+------------------+-----------+-----------------------+
| user             | host      | plugin                |
+------------------+-----------+-----------------------+
| mysql.infoschema | localhost | caching_sha2_password |
| mysql.session    | localhost | caching_sha2_password |
| mysql.sys        | localhost | caching_sha2_password |
| root             | localhost | caching_sha2_password |
+------------------+-----------+-----------------------+
4 rows in set (0.00 sec)

# default charset
mysql> show variables like "chara%"; 
+--------------------------+----------------------------+
| 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     | utf8mb3                    |
| character_sets_dir       | /usr/share/mysql/charsets/ |
+--------------------------+----------------------------+
8 rows in set (0.00 sec)

# databases
mysql> show databases; 
+--------------------+
| Database           |
+--------------------+
| information_schema |
| mysql              |
| performance_schema |
| sys                |
+--------------------+
4 rows in set (0.00 sec)

# to enable password validation that is run with [mysql_secure_installation],
# set like follows
# * to disable it, run [uninstall component ***]
mysql> install component 'file://component_validate_password'; 
Query OK, 0 rows affected (0.01 sec)

mysql> show variables like 'validate_password%'; 
+-------------------------------------------------+--------+
| Variable_name                                   | Value  |
+-------------------------------------------------+--------+
| validate_password.changed_characters_percentage | 0      |
| validate_password.check_user_name               | ON     |
| validate_password.dictionary_file               |        |
| validate_password.length                        | 8      |
| validate_password.mixed_case_count              | 1      |
| validate_password.number_count                  | 1      |
| validate_password.policy                        | MEDIUM |
| validate_password.special_char_count            | 1      |
+-------------------------------------------------+--------+
8 rows in set (0.00 sec)

# * to change validation policy parameters, 
# set parameters under the [mysqld] section in [/etc/my.cnf.d/mysql-server.cnf]
# ex. validate_password.policy=LOW


# create test database
mysql> create database test_database; 
Query OK, 1 row affected (0.11 sec)

# create test table on test database
mysql> create table test_database.test_table (id int, name varchar(50), address varchar(50), primary key (id)); 
Query OK, 0 rows affected (0.42 sec)

# insert data to test table
mysql> insert into test_database.test_table(id, name, address) values("001", "CentOS", "Hiroshima"); 
Query OK, 1 row affected (0.04 sec)

# show test table
mysql> select * from test_database.test_table; 
+----+--------+-----------+
| id | name   | address   |
+----+--------+-----------+
|  1 | CentOS | Hiroshima |
+----+--------+-----------+
1 row in set (0.00 sec)

# delete test database
mysql> drop database test_database; 
Query OK, 1 row affected (0.27 sec)

mysql> exit
Bye