ERROR 1130: Host ’...′ is not allowed to connect to this MySQL server

            /*
            *******************************************************************
 * ERROR 1130: Host ’...′ is not allowed to connect to this MySQL server
 * 说明：
 *     使用远程登录mysql，结果无法登录，记录一下解决方法。
 * 
 *                                  2016-9-22 深圳 南山平山村 曾剑锋
 ******************************************************************
            */
            

一、参考文档：
    
            1. 报错:1130-host ... is not allowed to connect to this MySql server 开放mysql远程连接 不使用localhost
        http://www.cnblogs.com/xyzdw/archive/2011/08/11/2135227.html2. 开启Mysql远程访问的所有方法  
        http://superyjcqw.blog.163.com/blog/static/16105830520117111040436/
二、报错：
    1. ERROR 1130: Host ’...′ is not allowed to connect to this MySQL server
    2. ERROR 1062 (23000): Duplicate entry ‘%-root‘for key ‘PRIMARY‘

三、解决办法：
    1. use mysql;
    2. update user set host=’%’ where user=’root’ and host=’localhost’;
    3. select host, user from user;