1.sudo vim /etc/mysql/mysql.conf.d/mysqld.cnf
修改配文件，将bind-address = 127.0.0.1注释，开放所有连接
2.查看权限
（1）登录MySQL
（2）use mysql;
（3）select host, user from user;
如果host不是%，则进行第三步，将host设置为%
3.增加权限
UPDATE user SET Host = ‘%’ WHERe User = ‘root’ AND Host=’localhost’;
