要通过远程连接MySQL，需要做两步：

第一步是要创建一个可以远程连接的 MySQL 用户

mysql> GRANT ALL PRIVILEGES ON remote.* TO remote@"%" IDENTIFIED BY "remotepwd";

第二步是要修改 mysql 的配置文件 /etc/mysql/my.cnf

$> sudo vi /etc/mysql/my.cnf

在旧版本中找到 skip-networking，把它注释掉就可以了
#skip-networking

在新版本中：
# 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

bind-address?????????? = 127.0.0.1 这一行要注释掉
#bind-address?????????? = 127.0.0.1

或者把允许访问的 ip 填上
#bind-address?????? = 192.168.1.100

然后重启 MySQL
$> sudo /etc/init.d/mysql restart
* Starting MySQL database server mysqld
?? ...done.
* Checking for corrupt, not cleanly closed and upgrade needing tables.
andy@ubuntu:~$ sudo /etc/init.d/mysql start
* Starting MySQL database server mysqld
?? ...done.

这样就可以远程访问 MySQL 了