1.修改配置文件（windows下可以不设置此项）

sudo vim /etc/mysql/my.cnf

把bind-address参数的值改成你的内/外网IP或0.0.0.0,或者直接注释掉这行.

2.登录数据库

mysql -u root -p

输入密码

mysql> use mysql;

3.查询host

mysql> select user,host from user;

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;

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 '123456' WITH GRANT OPTION;

mysql> flush privileges;

IP为10.39.5.74的主机以用户root和密码123456连接到mysql服务器

mysql> GRANT ALL PRIVILEGES ON *.* TO 'root'@'10.39.5.74' IDENTIFIED BY '123456' WITH GRANT OPTION; 

mysql> flush privileges;