注释：如果你制作的本地源还在继续完善中，有一些包还需要不断地更新和添加的话，为了不耽误你自己的使用，在你能连接外网的情况下，可使用以下两组apt源作为补充：
deb http://debian.ustc.edu.cn/ubuntu/ gutsy main restricted universe multiverse
deb http://debian.ustc.edu.cn/ubuntu/ gutsy-backports main restricted universe multiverse
deb http://debian.ustc.edu.cn/ubuntu/ gutsy-proposed main restricted universe multiverse
deb http://debian.ustc.edu.cn/ubuntu/ gutsy-security main restricted universe multiverse
deb http://debian.ustc.edu.cn/ubuntu/ gutsy-updates main restricted universe multiverse
deb-src http://debian.ustc.edu.cn/ubuntu/ gutsy main restricted universe multiverse
deb-src http://debian.ustc.edu.cn/ubuntu/ gutsy-backports main restricted universe multiverse
deb-src http://debian.ustc.edu.cn/ubuntu/ gutsy-proposed main restricted universe multiverse
deb-src http://debian.ustc.edu.cn/ubuntu/ gutsy-security main restricted universe multiverse
deb-src http://debian.ustc.edu.cn/ubuntu/ gutsy-updates main restricted universe multiverse
deb http://mirror.bjtu.edu.cn/ubuntu/ gutsy main restricted universe multiverse
deb http://mirror.bjtu.edu.cn/ubuntu/ gutsy-updates main restricted universe multiverse
deb http://mirror.bjtu.edu.cn/ubuntu/ gutsy-security main restricted universe multiverse
deb http://mirror.bjtu.edu.cn/ubuntu/ gutsy-backports main restricted universe multiverse
deb http://mirror.bjtu.edu.cn/ubuntu/ gutsy-proposed main restricted universe multiverse
deb-src http://mirror.bjtu.edu.cn/ubuntu/ gutsy main restricted universe multiverse
deb-src http://mirror.bjtu.edu.cn/ubuntu/ gutsy-updates main restricted universe multiverse
deb-src http://mirror.bjtu.edu.cn/ubuntu/ gutsy-security main restricted universe multiverse
deb-src http://mirror.bjtu.edu.cn/ubuntu/ gutsy-backports main restricted universe multiverse
deb-src http://mirror.bjtu.edu.cn/ubuntu/ gutsy-proposed main restricted universe multiverse
命令
sudo gedit /etc/apt/sources.list
把上面的两组源添加到sources.list文件中，保存并退出。
sudo apt-get update
sudo apt-get dist-upgrade
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