mysql安装和初始化设置

ubuntu

1）安装：

sudo apt-get install mysql-server

2）启动服务：

sudo service mysql start

3）设置root密码：(第一次使用，因为没有root密码，输入的密码就会成为root密码）

sudo mysql -u root -p

如果出现：

Enter password:
Welcome to the MySQL monitor. Commands end with ; or \g.
Your MySQL connection id is 10
Server version: 8.0.29-0ubuntu0.20.04.3 (Ubuntu)

Copyright (c) 2000, 2022, 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>

恭喜你，完成了。

4）建立用户

CREATE USER 'dog'@'localhost' IDENTIFIED BY '123456';
GRANT ALL ON *.* TO 'dog'@'%';

5）如果需要删除用户

DROP USER 'dog'@'%';

6) 修改root密码

alter user 'root'@'localhost' identified by  '123';

7）退出

quit