1.登录

mysql -uroot -p

2.执行命令

切换数据库

mysql> use mysql;

查询表

查询host
mysql> select user,host from user;

创建host

4.创建host
如果没有"%"这个host值,就执行下面这两句:
mysql> update user set host='%' where user='root';
mysql> flush privileges;

授权

5.授权用户
任意主机以用户root和密码mypwd连接到mysql服务器
mysql> GRANT ALL PRIVILEGES ON *.* TO 'root'@'%' IDENTIFIED BY '密码' WITH GRANT OPTION;
mysql> flush privileges;