ubuntu版本：
Distributor ID: Ubuntu
Description: Ubuntu 20.04 LTS
Release: 20.04
Codename: focal

mysql-server版本：8

安装mysql
1.sudo apt install mysql-server
2.查看密码
sudo vim /etc/mysql/debian.cnf
3.登录mysql并修改用户密码
alter user 'root'@'localhost' identified with mysql_native_password by 'pw'
flush privileges;
4.修改登录权限，使得数据库能远程访问
update user set host=’%’ where user=’root’;
flush privileges;

这样就安装配置好了mysql