MySQL-1130-host ... is not allowed to connect to this MySql server

1、解决方式一：改表法

    ~ user mysql;
    ~ update user set host = '%' where user = 'root';
    ~ select host, user from user;
    ~ flush privileges;//刷新权限
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2、方法二：授权法

    //不限制IP
    GRANT ALL PRIVILEGES ON *.* TO 'root'@'%' IDENTIFIED BY '你的密码' WITH GRANT OPTION;
    flush privileges;
    //限制IP
    GRANT ALL PRIVILEGES ON *.* TO 'root'@'192.168.1.2' IDENTIFIED BY 'password' WITH GRANT OPTION;
    flush privileges;
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