ubuntu9.10的源，用于更新； Archive.ubuntu.com更新服务器（欧洲，此为官方源，电信网通用户使用)： deb http://archive.ubuntu.com/ubuntu/ karmic main restricted universe multiverse deb http://archive.ubuntu.com/ubuntu/ karmic-security main restricted universe multiverse deb http://archive.ubuntu.com/ubuntu/ karmic-updates main restri