查看mysql中的用戶和密碼

use mysql;
select host,user,password from user;
設置密碼
set password for root@localhost=password('root');
創建用戶
create user 'root'@'172.18.23.201' identified by 'root';
grant all privileges on root.* to 'root'@'172.18.23.201' identified by 'root';
flush privileges;