1、修改localhost
更改 "mysql" 數據庫裏的 "user" 表裏的 "host" 項，從"localhost"改成"%"
mysql>use mysql;
mysql>update user set host = '%' where user = 'root';
mysql>select host, user from user;
mysql>FLUSH PRIVILEGES;
2、指定授權
使用myuser/mypassword從任何主機連接到mysql服務器:
GRANT ALL PRIVILEGES ON *.* TO 'myuser'@'%' IDENTIFIED BY 'mypassword' WITH GRANT OPTION;
使用myuser/mypassword從ip爲192.168.225.166的主機連接到mysql服務器:
GRANT ALL PRIVILEGES ON *.* TO 'myuser'@'192.168.225.166' IDENTIFIED BY 'mypassword' WITH GRANT OPTION;
3、泛授權
mysql -h localhost -u root
mysql>GRANT ALL PRIVILEGES ON *.* TO 'root'@'%' WITH GRANT OPTION; //賦予任何主機上以root身份訪問數據的權限
mysql>FLUSH PRIVILEGES;
解決Mysql無法遠程連接的問題
轉：
1、Mysql的端口是否正確
通過netstat -ntlp查看端口占用情況，一般情況下端口是3306。在用工具連接MySQl是要用到端口。例如My Admin/My Query Browser/MySQl Front等。
2、檢查用戶權限是否正確
mysql庫的user表裏有兩條記錄：host分別爲localhost和%(爲了安全，%可以換成你需要外部連接的IP)。
3、查看/etc/mysql/my.cnf中,skip-networking 是否已被注掉
需要注掉
報錯：ERROR 2003 (HY000): Can't connect to MySQL server on '192.168.51.112' (111)
sudo gedit /etc/mysql/my.cnf
#skip-external-locking
#bind-address = 127.0.0.1
skip-name-resolve
4、查看iptables是否停掉,沒關的情況下,無法連接
通過：service iptables stop臨時關閉。
報錯：ERROR 2003 (HY000): Can't connect to MySQL server on '192.168.51.112' (113)