远程无法访问mysql Can't connect to MySQL server on "host" (111)

默认情况下Mysql只允许本地登录，所以需要修改配置文件将地址绑定给注释掉：

vim /etc/mysql/my.cnf

# Instead of skip-networking the default is now to listen only on

# localhost which is more compatible and is not less secure.

#bind-address =
127.0.0.1 <---注释掉这一行就可以远程登录了