1.mysql修改root密码

mysqladmin -uroot -p旧密码 password 新密码


2.mysql -uroot -p密码

use mysql

update user set password=PASSWORD('密码') where user="root";

flush privileges;



3.mysql查看当前连接数和状态

show full processlist;


show status;


4.查看mysql数据库用户

select user from user;