更新apt工具
sudo apt update
安装MySQL
sudo apt install mysql-server
查看MySQL状态
sudo systemctl status mysql
pass@pass:~$ sudo systemctl status mysql
● mysql.service - MySQL Community Server
Loaded: loaded (/lib/systemd/system/mysql.service; enabled; vendor preset: enabled)
Active: active (running) since Tue 2024-03-19 12:27:01 UTC; 17s ago
Main PID: 2649 (mysqld)
Status: "Server is operational"
Tasks: 38 (limit: 4557)
Memory: 365.5M
CGroup: /system.slice/mysql.service
└─2649 /usr/sbin/mysqld
Mar 19 12:27:00 pass systemd[1]: Starting MySQL Community Server...
Mar 19 12:27:01 pass systemd[1]: Started MySQL Community Server.
初始MySQL配置
sudo mysql_secure_installation
pass@pass:~$ 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
根据提示按照个人需求操作....
以root用户登录，自定义密码
pass@pass:~$ sudo mysql
Welcome to the MySQL monitor. Commands end with ; or \g.
Your MySQL connection id is 10
Server version: 8.0.36-0ubuntu0.20.04.1 (Ubuntu)
Copyright (c) 2000, 2024, Oracle and/or its affiliates.
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>
自定义密码步骤，修改密码等级操作
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 | LOW |
| validate_password.special_char_count | 1 |
+-------------------------------------------------+-------+
8 rows in set (0.01 sec)
mysql> set global validate_password.policy=LOW;
Query OK, 0 rows affected (0.01 sec)
mysql> set global validate_password.length =4;
Query OK, 0 rows affected (0.00 sec)
mysql> ALTER user 'root'@'localhost' IDENTIFIED BY 'pass';
Query OK, 0 rows affected (0.00 sec)
mysql> exit
Bye
刷新数据库，查看root用户
mysql> flush privileges;
Query OK, 0 rows affected (0.00 sec)
mysql> SELECT user,host FROM mysql.user;
+------------------+-----------+
| user | host |
+------------------+-----------+
| debian-sys-maint | localhost |
| mysql.infoschema | localhost |
| mysql.session | localhost |
| mysql.sys | localhost |
| root | localhost |
+------------------+-----------+
5 rows in set (0.00 sec)
mysql> quit;
Bye