以太之内 生存之上

备份软件源: sudo cp /etc/apt/sources.list /etc/apt/sources.list_backup 编辑软件源: sudo gedit /etc/apt/sources.list 更新软件源: sudo apt-get update #—– contents of sources.list  —————————————————————# #传说中的中国科技大学 5M/s deb http://debian.ustc.edu.cn/ubuntu/ karmic main restricted universe multiverse deb http://debian.ustc.edu.cn/ubuntu/ karmic-backports restricted universe multiverse deb http://debian.ustc.edu.cn/ubuntu/ karmic-proposed main restricted universe multiverse deb http://debian.ustc.edu.cn/ubuntu/ karmic-security main restricted universe multiverse