一、先检查MySQL的登录用户是否开启了访问权限

mysql> use mysql;
mysql> select host,user from user; 

mysql-root-state

修改root用户的访问权限

mysql> update user set host = '%' where user = 'root';

为root用户赋予远程访问权限

mysql> GRANT ALL PRIVILEGES ON *.* TO 'root'@'%' IDENTIFIED BY 'your password' WITH GRANT OPTION;

刷新权限或重启MySQL

mysql> flush privileges;

二、检查MySQL的配置文件是否设置了端口绑定

root@ubuntu: vim /etc/mysql/my.cnf

将文件中的bind-address = 127.0.0.1 注释掉，如下：

# bind-address = 127.0.0.1

保存退出重启MySQL

root@ubuntu: service mysql restart