执行命令apt install mysql-server安装mysql
mysql默认是没有密码的，执行mysql -u root就能连接上了
如果我要给wordpress提供mysql，那么我一般这样做
1. 创建用户wp
create user ‘wp’@’localhost’ identified with mysql_native_password by ‘111111’;
2. 创建数据库wordpress
creat database wordpress;
3. 赋权给wp
grant all privileges on wordpress.* to ‘wp’@’localhost’;
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