一、命令安装mysql

apt install mysql-server

二、修改账号和密码

• 默认的root没有密码
  ```shell vim /etc/mysql/debian.cnf # 查看用户信息

  使用root进入后修改host信息
```sql
use mysql;
select User,Host   from user; # 查看配置
update user set Host ='%' where User = 'root'; # 修改localhost为%，能够让外面连接进来
update user set authentication_string=password('qq1448265203') where user='root'; # 修改root用户的密码
grant all privileges on *.* to 'root'@'%' identified WITH mysql_native_password BY by 'qq1448265203';
MYSQL:
    //把系统的root修改密码
    update mysql.user set authentication_string=password('qq1448265203') where user='root';
    //能远程访问
    GRANT ALL PRIVILEGES ON *.* TO 'root'@'%' IDENTIFIED BY 'qq1448265203';
    update user set authentication_string=PASSWORD('qq1448265203') where user='root';  # 更改密码
    grant all privileges on *.* to 'root'@'%' identified WITH mysql_native_password BY by 'qq1448265203';
    ALTER USER 'root’@‘localhost' IDENTIFIED WITH mysql_native_password BY ‘你的密码’;

参考博客