1. 備份原始文件
?sudo cp /etc/apt/sources.list /etc/apt/sources.list.backup
2. 修改source.list文件：
sudo gedit /etc/apt/sources.list
3. 注釋原文件內的源并添加如下地址
?#Ubuntu 官方源
deb http://archive.ubuntu.com/ubuntu/ gutsy main restricted universe multiverse deb http://archive.ubuntu.com/ubuntu/ gutsy-security main restricted universe multiverse deb http://archive.ubuntu.com/ubuntu/ gutsy-updates main restricted universe multiverse deb http://archive.ubuntu.com/ubuntu/ gutsy-proposed main restricted universe multiverse deb http://archive.ubuntu.com/ubuntu/ gutsy-backports main restricted universe multiverse deb-src http://archive.ubuntu.com/ubuntu/ gutsy main restricted universe multiverse deb-src http://archive.ubuntu.com/ubuntu/ gutsy-security main restricted universe multiverse deb-src http://archive.ubuntu.com/ubuntu/ gutsy-updates main restricted universe multiverse deb-src http://archive.ubuntu.com/ubuntu/ gutsy-proposed main restricted universe multiverse deb-src http://archive.ubuntu.com/ubuntu/ gutsy-backports main restricted universe multiverse
? #阿里云
deb http://mirrors.aliyun.com/ubuntu/ trusty main restricted universe multiverse deb http://mirrors.aliyun.com/ubuntu/ trusty-security main restricted universe multiverse deb http://mirrors.aliyun.com/ubuntu/ trusty-updates main restricted universe multiverse deb http://mirrors.aliyun.com/ubuntu/ trusty-proposed main restricted universe multiverse deb http://mirrors.aliyun.com/ubuntu/ trusty-backports main restricted universe multiverse deb-src http://mirrors.aliyun.com/ubuntu/ trusty main restricted universe multiverse deb-src http://mirrors.aliyun.com/ubuntu/ trusty-security main restricted universe multiverse deb-src http://mirrors.aliyun.com/ubuntu/ trusty-updates main restricted universe multiverse deb-src http://mirrors.aliyun.com/ubuntu/ trusty-proposed main restricted universe multiverse deb-src http://mirrors.aliyun.com/ubuntu/ trusty-backports main restricted universe multiverse
#網易163
?deb http://mirrors.163.com/ubuntu/ trusty main restricted universe multiverse deb http://mirrors.163.com/ubuntu/ trusty-security main restricted universe multiverse deb http://mirrors.163.com/ubuntu/ trusty-updates main restricted universe multiverse deb http://mirrors.163.com/ubuntu/ trusty-proposed main restricted universe multiverse deb http://mirrors.163.com/ubuntu/ trusty-backports main restricted universe multiverse deb-src http://mirrors.163.com/ubuntu/ trusty main restricted universe multiverse deb-src http://mirrors.163.com/ubuntu/ trusty-security main restricted universe multiverse deb-src http://mirrors.163.com/ubuntu/ trusty-updates main restricted universe multiverse deb-src http://mirrors.163.com/ubuntu/ trusty-proposed main restricted universe multiverse deb-src http://mirrors.163.com/ubuntu/ trusty-backports main restricted universe multiverse
4. 放置非官方源的包不完整，可在這添加官方源
deb http://archive.ubuntu.org.cn/ubuntu-cn/ feisty main restricted universe multiverse
5. 更新源
sudo apt-get update
6. 更新軟件
sudo apt-get dist-upgrade sudo apt-get upgrade
?由于包與包之間存在各種依賴關系。upgrade只是簡單的更新包，不管這些依賴，它不和添加包，或是刪除包。而dist-upgrade可以根據依賴關系的變化，添加包，刪除包。upgrade:系統將現有的Package升級,如果有相依性的問題,而此相依性需要安裝其它新的Package或影響到其它Package的相依性時,此Package就不會被升級,會保留下來. dist-upgrade:可以聰明的解決相依性的問題,如果有相依性問題,需要安裝/移除新的Package,就會試著去安裝/移除它. (所以通常這個會被認為是有點風險的升級)
7. 常見的修復安裝命令
?sudo apt-get -f install
