编辑Ubuntu源的方法：
#sudo gedit /etc/apt/sources.list
将文件里的内容全部删除，当然之前也可以用 sudo cp /etc/apt/sources.list /etc/apt/sources.list.bak命令的方式进行备份，以备不时之需。然后将下列的内容粘贴进gedit后保存即可。
Ubuntu 10.04源列表：
台湾
代码:
deb lucid main universe restricted multiverse
deb-src lucid main universe restricted multiverse
deb lucid-security universe main multiverse restricted
deb-src lucid-security universe main multiverse restricted
deb lucid-updates universe main multiverse restricted
deb-src lucid-updates universe main multiverse restricted
SRT Sources
代码:
deb lucid main restricted universe multiverse
deb lucid-security main restricted universe multiverse
deb lucid-updates main restricted universe multiverse
deb lucid-proposed main restricted universe multiverse
deb lucid-backports main restricted universe multiverse
deb-src lucid main restricted universe multiverse
deb-src lucid-security main restricted universe multiverse
deb-src lucid-updates main restricted universe multiverse
deb-src lucid-proposed main restricted universe multiverse
deb-src lucid-backports main restricted universe multiverse
网易（速度很快）
代码:
deb lucid main universe restricted multiverse
deb-src lucid main universe restricted multiverse
deb lucid-security universe main multiverse restricted
deb-src lucid-security universe main multiverse restricted
deb lucid-updates universe main multiverse restricted
deb lucid-proposed universe main multiverse restricted
deb-src lucid-proposed universe main multiverse restricted
deb lucid-backports universe main multiverse restricted
deb-src lucid-backports universe main multiverse restricted
deb-src lucid-updates universe main multiverse restricted
ubuntu官方上海源，提供 Kernel，Hiweed，ubuntu
代码:
deb lucid main universe restricted multiverse
deb-src lucid main universe restricted multiverse
deb lucid-security universe main multiverse restricted
deb-src lucid-security universe main multiverse restricted
deb lucid-updates universe main multiverse restricted
deb lucid-proposed universe main multiverse restricted
deb-src lucid-proposed universe main multiverse restricted
deb lucid-backports universe main multiverse restricted
deb-src lucid-backports universe main multiverse restricted
deb-src lucid-updates universe main multiverse restricted
搜狐
代码:
deb lucid main universe restricted multiverse
deb-src lucid main universe restricted multiverse
deb lucid-security universe main multiverse restricted
deb-src lucid-security universe main multiverse restricted
deb lucid-updates universe main multiverse restricted
deb lucid-proposed universe main multiverse restricted
deb-src lucid-proposed universe main multiverse restricted
deb lucid-backports universe main multiverse restricted
deb-src lucid-backports universe main multiverse restricted
deb-src lucid-updates universe main multiverse restricted
骨头源，骨头源是bones7456架设的一个Ubuntu源 ，提供ubuntu,deepin
代码:
deb lucid main universe restricted multiverse
deb-src lucid main universe restricted multiverse
deb lucid-security universe main multiverse restricted
deb-src lucid-security universe main multiverse restricted
deb lucid-updates universe main multiverse restricted
deb lucid-proposed universe main multiverse restricted
deb-src lucid-proposed universe main multiverse restricted
deb lucid-backports universe main multiverse restricted
deb-src lucid-backports universe main multiverse restricted
deb-src lucid-updates universe main multiverse restricted
保存后输入下面的指令刷新源信息：
#sudo apt-get update
然后输入：
#sudo apt-get upgrade
就可以进行系统升级了。
