情況一：

授權法。例如，你想myuser使用mypassword從任何主機連線到mysql伺服器的話。 
GRANT ALL PRIVILEGES ON *.* TO 'myuser'@'%' IDENTIFIED BY 'mypassword' WITH GRANT OPTION; 
如果你想允許使用者myuser從ip為192.168.1.3的主機連線到mysql伺服器，並使用mypassword作為密碼 
GRANT ALL PRIVILEGES ON *.* TO 'myuser'@'192.168.1.3' IDENTIFIED BY 
'mypassword' WITH GRANT OPTION; 

1.mysql>GRANT ALL PRIVILEGES ON *.* TO 'root'@'192.168.1.199' IDENTIFIED BY 'root' WITH GRANT OPTION;  

2.mysql>flush privileges;

情況二：

需要修改mysql配置檔案

步驟:

(1)cd /etc/mysql

(2)vim my.cnf

(3)將bind-address  = 127.0.0.1修改為bind-address = 0.0.0.0

(4)儲存退出

(5)/etc/init.d/mysql restart  (一定要重啟資料庫,不然沒用)