系統安裝後，更新源很少，導致速度會很慢，所以需要對更新源進行配置，配置方法如下：
sudo cp /etc/apt/sources.list /etc/apt/sources.list.backup （備份當前的源列表，以便日後需要時恢復）
sudo gedit /etc/apt/sources.list （修改sources.list文件中源的列表）
源地址：
歐洲官方源：
deb http://archive.ubuntu.com/ubuntu/ jaunty main restricted universe multiverse
deb http://archive.ubuntu.com/ubuntu/ jaunty-security main restricted universe multiverse
deb http://archive.ubuntu.com/ubuntu/ jaunty-updates main restricted universe multiverse
deb http://archive.ubuntu.com/ubuntu/ jaunty-proposed main restricted universe multiverse
deb http://archive.ubuntu.com/ubuntu/ jaunty-backports main restricted universe multiverse
deb-src http://archive.ubuntu.com/ubuntu/ jaunty main restricted universe multiverse
deb-src http://archive.ubuntu.com/ubuntu/ jaunty-security main restricted universe multiverse
deb-src http://archive.ubuntu.com/ubuntu/ jaunty-updates main restricted universe multiverse
deb-src http://archive.ubuntu.com/ubuntu/ jaunty-proposed main restricted universe multiverse
deb-src http://archive.ubuntu.com/ubuntu/ jaunty-backports main restricted universe multiverse
建議包含。
其他更新源
# 國內電信源
deb http://mirror.lupaworld.com/ubuntu/archive/ jaunty main restricted universe multiverse
deb http://mirror.lupaworld.com/ubuntu/archive/ jaunty-updates main restricted universe multiverse
deb http://mirror.lupaworld.com/ubuntu/archive/ jaunty-backports main restricted universe multiverse
deb http://mirror.lupaworld.com/ubuntu/archive/ jaunty-security main restricted universe multiverse
deb http://mirror.lupaworld.com/ubuntu/archive/ jaunty-proposed main multiverse restricted universe
deb-src http://mirror.lupaworld.com/ubuntu/archive/ jaunty main restricted universe multiverse
deb-src http://mirror.lupaworld.com/ubuntu/archive/ jaunty-updates main restricted universe multiverse
deb-src http://mirror.lupaworld.com/ubuntu/archive/ jaunty-backports main restricted universe multiverse
deb-src http://mirror.lupaworld.com/ubuntu/archive/ jaunty-security main restricted universe multiverse
deb-src http://mirror.lupaworld.com/ubuntu/archive/ jaunty-proposed main restricted universe multiverse
#傳說中的中國科技大學
deb http://debian.ustc.edu.cn/ubuntu/ jaunty main restricted universe multiverse
deb http://debian.ustc.edu.cn/ubuntu/ jaunty-backports restricted universe multiverse
deb http://debian.ustc.edu.cn/ubuntu/ jaunty-proposed main restricted universe multiverse
deb http://debian.ustc.edu.cn/ubuntu/ jaunty-security main restricted universe multiverse
deb http://debian.ustc.edu.cn/ubuntu/ jaunty-updates main restricted universe multiverse
deb-src http://debian.ustc.edu.cn/ubuntu/ jaunty main restricted universe multiverse
deb-src http://debian.ustc.edu.cn/ubuntu/ jaunty-backports main restricted universe multiverse
deb-src http://debian.ustc.edu.cn/ubuntu/ jaunty-proposed main restricted universe multiverse
deb-src http://debian.ustc.edu.cn/ubuntu/ jaunty-security main restricted universe multiverse
deb-src http://debian.ustc.edu.cn/ubuntu/ jaunty-updates main restricted universe multiverse
#傳說中的北京交大
deb http://mirror.bjtu.edu.cn/ubuntu/ jaunty main restricted universe multiverse
deb http://mirror.bjtu.edu.cn/ubuntu/ jaunty-backports restricted universe multiverse
deb http://mirror.bjtu.edu.cn/ubuntu/ jaunty-proposed main restricted universe multiverse
deb http://mirror.bjtu.edu.cn/ubuntu/ jaunty-security main restricted universe multiverse
deb http://mirror.bjtu.edu.cn/ubuntu/ jaunty-updates main restricted universe multiverse
deb-src http://mirror.bjtu.edu.cn/ubuntu/ jaunty main restricted universe multiverse
deb-src http://mirror.bjtu.edu.cn/ubuntu/ jaunty-backports main restricted universe multiverse
deb-src http://mirror.bjtu.edu.cn/ubuntu/ jaunty-proposed main restricted universe multiverse
deb-src http://mirror.bjtu.edu.cn/ubuntu/ jaunty-security main restricted universe multiverse
deb-src http://mirror.bjtu.edu.cn/ubuntu/ jaunty-updates main restricted universe multiverse
#傳說中的上海交通大學，最熱門的源之一
deb http://ftp.sjtu.edu.cn/ubuntu/ jaunty main multiverse restricted universe
deb http://ftp.sjtu.edu.cn/ubuntu/ jaunty-backports main multiverse restricted universe
deb http://ftp.sjtu.edu.cn/ubuntu/ jaunty-proposed main multiverse restricted universe
deb http://ftp.sjtu.edu.cn/ubuntu/ jaunty-security main multiverse restricted universe
deb http://ftp.sjtu.edu.cn/ubuntu/ jaunty-updates main multiverse restricted universe
deb http://ftp.sjtu.edu.cn/ubuntu-cn/ jaunty main multiverse restricted universe
deb-src http://ftp.sjtu.edu.cn/ubuntu/ jaunty main multiverse restricted universe
deb-src http://ftp.sjtu.edu.cn/ubuntu/ jaunty-backports main multiverse restricted universe
deb-src http://ftp.sjtu.edu.cn/ubuntu/ jaunty-proposed main multiverse restricted universe
deb-src http://ftp.sjtu.edu.cn/ubuntu/ jaunty-security main multiverse restricted universe
deb-src http://ftp.sjtu.edu.cn/ubuntu/ jaunty-updates main multiverse restricted universe
#傳說中的清華大學ubuntu源
deb ftp://ftp3.tsinghua.edu.cn/mirror/ubuntu/ubuntu/ jaunty main restricted universe multiverse
deb ftp://ftp3.tsinghua.edu.cn/mirror/ubuntu/ubuntu/ jaunty-backports restricted universe multiverse
deb ftp://ftp3.tsinghua.edu.cn/mirror/ubuntu/ubuntu/ jaunty-proposed main restricted universe multiverse
deb ftp://ftp3.tsinghua.edu.cn/mirror/ubuntu/ubuntu/ jaunty-security main restricted universe multiverse
deb ftp://ftp3.tsinghua.edu.cn/mirror/ubuntu/ubuntu/ jaunty-updates main restricted universe multiverse
deb-src ftp://ftp3.tsinghua.edu.cn/mirror/ubuntu/ubuntu/ jaunty main restricted universe multiverse
deb-src ftp://ftp3.tsinghua.edu.cn/mirror/ubuntu/ubuntu/ jaunty-backports main restricted universe multiverse
deb-src ftp://ftp3.tsinghua.edu.cn/mirror/ubuntu/ubuntu/ jaunty-proposed main restricted universe multiverse
deb-src ftp://ftp3.tsinghua.edu.cn/mirror/ubuntu/ubuntu/ jaunty-security main restricted universe multiverse
deb-src ftp://ftp3.tsinghua.edu.cn/mirror/ubuntu/ubuntu/ jaunty-updates main restricted universe multiverse
#傳說中的蘭州大學
deb ftp://mirror.lzu.edu.cn/ubuntu/ jaunty main restricted universe multiverse
deb ftp://mirror.lzu.edu.cn/ubuntu/ jaunty-backports restricted universe multiverse
deb ftp://mirror.lzu.edu.cn/ubuntu/ jaunty-proposed main restricted universe multiverse
deb ftp://mirror.lzu.edu.cn/ubuntu/ jaunty-security main restricted universe multiverse
deb ftp://mirror.lzu.edu.cn/ubuntu/ jaunty-updates main restricted universe multiverse
deb-src ftp://mirror.lzu.edu.cn/ubuntu/ jaunty main restricted universe multiverse
deb-src ftp://mirror.lzu.edu.cn/ubuntu/ jaunty-backports main restricted universe multiverse
deb-src ftp://mirror.lzu.edu.cn/ubuntu/ jaunty-proposed main restricted universe multiverse
deb-src ftp://mirror.lzu.edu.cn/ubuntu/ jaunty-security main restricted universe multiverse
deb-src ftp://mirror.lzu.edu.cn/ubuntu/ jaunty-updates main restricted universe multiverse
#傳說中的臺灣大學
deb http://ubuntu.csie.ntu.edu.tw/ubuntu/ jaunty main restricted universe multiverse
deb http://ubuntu.csie.ntu.edu.tw/ubuntu/ jaunty-backports restricted universe multiverse
deb http://ubuntu.csie.ntu.edu.tw/ubuntu/ jaunty-proposed main restricted universe multiverse
deb http://ubuntu.csie.ntu.edu.tw/ubuntu/ jaunty-security main restricted universe multiverse
deb http://ubuntu.csie.ntu.edu.tw/ubuntu/ jaunty-updates main restricted universe multiverse
deb-src http://ubuntu.csie.ntu.edu.tw/ubuntu/ jaunty main restricted universe multiverse
deb-src http://ubuntu.csie.ntu.edu.tw/ubuntu/ jaunty-backports main restricted universe multiverse
deb-src http://ubuntu.csie.ntu.edu.tw/ubuntu/ jaunty-proposed main restricted universe multiverse
deb-src http://ubuntu.csie.ntu.edu.tw/ubuntu/ jaunty-security main restricted universe multiverse
deb-src http://ubuntu.csie.ntu.edu.tw/ubuntu/ jaunty-updates main restricted universe multiverse
#傳說中的電子科大
deb http://ubuntu.uestc.edu.cn/ubuntu jaunty main restricted universe multiverse
deb http://ubuntu.uestc.edu.cn/ubuntu jaunty-backports main restricted universe multiverse
deb http://ubuntu.uestc.edu.cn/ubuntu jaunty-proposed main restricted universe multiverse
deb http://ubuntu.uestc.edu.cn/ubuntu jaunty-security main restricted universe multiverse
deb http://ubuntu.uestc.edu.cn/ubuntu jaunty-updates main restricted universe multiverse
deb-src http://ubuntu.uestc.edu.cn/ubuntu jaunty main restricted universe multiverse
deb-src http://ubuntu.uestc.edu.cn/ubuntu jaunty-backports main restricted universe multiverse
deb-src http://ubuntu.uestc.edu.cn/ubuntu jaunty-proposed main restricted universe multiverse
deb-src http://ubuntu.uestc.edu.cn/ubuntu jaunty-security main restricted universe multiverse
deb-src http://ubuntu.uestc.edu.cn/ubuntu jaunty-updates main restricted universe multiverse
deb http://ubuntu.uestc.edu.cn/ubuntu-cn jaunty main restricted universe multiverse
deb http://ubuntu.uestc.edu.cn/ubuntustudio jaunty main
#傳說中的清華，,但不是清華大學的官方域名
deb http://mirror9.net9.org/ubuntu/ jaunty main multiverse restricted universe
deb http://mirror9.net9.org/ubuntu/ jaunty-backports main multiverse restricted universe
deb http://mirror9.net9.org/ubuntu/ jaunty-proposed main multiverse restricted universe
deb http://mirror9.net9.org/ubuntu/ jaunty-security main multiverse restricted universe
deb http://mirror9.net9.org/ubuntu/ jaunty-updates main multiverse restricted universe
deb-src http://mirror9.net9.org/ubuntu/ jaunty main multiverse restricted universe
deb-src http://mirror9.net9.org/ubuntu/ jaunty-backports main multiverse restricted universe
deb-src http://mirror9.net9.org/ubuntu/ jaunty-proposed main multiverse restricted universe
deb-src http://mirror9.net9.org/ubuntu/ jaunty-security main multiverse restricted universe
deb-src http://mirror9.net9.org/ubuntu/ jaunty-updates main multiverse restricted universe
deb http://mirror9.net9.org/ubuntu-cn/ jaunty main multiverse restricted universe
#傳說中的電子科大,但不是uestc的官方域名
deb http://ubuntu.dormforce.net/ubuntu jaunty main restricted universe multiverse
deb http://ubuntu.dormforce.net/ubuntu jaunty-backports main restricted universe multiverse
deb http://ubuntu.dormforce.net/ubuntu jaunty-proposed main restricted universe multiverse
deb http://ubuntu.dormforce.net/ubuntu jaunty-security main restricted universe multiverse
deb http://ubuntu.dormforce.net/ubuntu jaunty-updates main restricted universe multiverse
deb-src http://ubuntu.dormforce.net/ubuntu jaunty main restricted universe multiverse
deb-src http://ubuntu.dormforce.net/ubuntu jaunty-backports main restricted universe multiverse
deb-src http://ubuntu.dormforce.net/ubuntu jaunty-proposed main restricted universe multiverse
deb-src http://ubuntu.dormforce.net/ubuntu jaunty-security main restricted universe multiverse
deb-src http://ubuntu.dormforce.net/ubuntu jaunty-updates main restricted universe multiverse
#傳說中的東北大學更新服務器：
deb ftp://ftp.neu.edu.cn/mirror/archive.ubuntu.com/ubuntu/ jaunty main multiverse restricted universe
deb ftp://ftp.neu.edu.cn/mirror/archive.ubuntu.com/ubuntu/ jaunty-backports main multiverse restricted universe
deb ftp://ftp.neu.edu.cn/mirror/archive.ubuntu.com/ubuntu/ jaunty-proposed main multiverse restricted universe
deb ftp://ftp.neu.edu.cn/mirror/archive.ubuntu.com/ubuntu/ jaunty-security main multiverse restricted universe
deb ftp://ftp.neu.edu.cn/mirror/archive.ubuntu.com/ubuntu/ jaunty-updates main multiverse restricted universe
deb-src ftp://ftp.neu.edu.cn/mirror/archive.ubuntu.com/ubuntu/ jaunty main multiverse restricted universe
deb-src ftp://ftp.neu.edu.cn/mirror/archive.ubuntu.com/ubuntu/ jaunty-backports main multiverse restricted universe
deb-src ftp://ftp.neu.edu.cn/mirror/archive.ubuntu.com/ubuntu/ jaunty-proposed main multiverse restricted universe
deb-src ftp://ftp.neu.edu.cn/mirror/archive.ubuntu.com/ubuntu/ jaunty-security main multiverse restricted universe
deb-src ftp://ftp.neu.edu.cn/mirror/archive.ubuntu.com/ubuntu/ jaunty-updates main multiverse restricted universe
#傳說中的廈門大學
deb ftp://ubuntu.realss.cn/ubuntu/ jaunty main restricted universe multiverse
deb ftp://ubuntu.realss.cn/ubuntu/ jaunty-backports restricted universe multiverse
deb ftp://ubuntu.realss.cn/ubuntu/ jaunty-proposed main restricted universe multiverse
deb ftp://ubuntu.realss.cn/ubuntu/ jaunty-security main restricted universe multiverse
deb ftp://ubuntu.realss.cn/ubuntu/ jaunty-updates main restricted universe multiverse
deb-src ftp://ubuntu.realss.cn/ubuntu/ jaunty main restricted universe multiverse
deb-src ftp://ubuntu.realss.cn/ubuntu/ jaunty-backports main restricted universe multiverse
deb-src ftp://ubuntu.realss.cn/ubuntu/ jaunty-proposed main restricted universe multiverse
deb-src ftp://ubuntu.realss.cn/ubuntu/ jaunty-security main restricted universe multiverse
deb-src ftp://ubuntu.realss.cn/ubuntu/ jaunty-updates main restricted universe multiverse
#傳說中的西南財經大學
deb http://ftp.swufe.edu.cn/mirror/ubuntu/ jaunty main restricted universe multiverse
deb http://ftp.swufe.edu.cn/mirror/ubuntu/ jaunty-backports restricted universe multiverse
deb http://ftp.swufe.edu.cn/mirror/ubuntu/ jaunty-proposed main restricted universe multiverse
deb http://ftp.swufe.edu.cn/mirror/ubuntu/ jaunty-security main restricted universe multiverse
deb http://ftp.swufe.edu.cn/mirror/ubuntu/ jaunty-updates main restricted universe multiverse
deb-src http://ftp.swufe.edu.cn/mirror/ubuntu/ jaunty main restricted universe multiverse
deb-src http://ftp.swufe.edu.cn/mirror/ubuntu/ jaunty-backports main restricted universe multiverse
deb-src http://ftp.swufe.edu.cn/mirror/ubuntu/ jaunty-proposed main restricted universe multiverse
deb-src http://ftp.swufe.edu.cn/mirror/ubuntu/ jaunty-security main restricted universe multiverse
deb-src http://ftp.swufe.edu.cn/mirror/ubuntu/ jaunty-updates main restricted universe multiverse
這些都是從網上找的更新源，選擇添加。
防止非官方源中軟件包不全的問題，請在sources.list文件中尾部添加下面這個官方源。
deb http://archive.ubuntu.org.cn/ubuntu-cn/ feisty main restricted universe multiverse
然後 保存編輯好的文件，執行以下命令更新。
sudo apt-get update #這一步是更新你的源列表，換源後必須執行
（如果更新速度非常慢請更換源 sudo gedit /etc/apt/sources.list ）
sudo apt-get dist-upgrade #這一步是更新軟件
我現在使用的源：
#Mirror.lupaworld.com 源更新服務器（浙江省杭州市雙線服務器，網通同電信都可以用，亞洲地區官方更新服務器）：
deb http://mirror.lupaworld.com/ubuntu gutsy main restricted universe multiverse
deb http://mirror.lupaworld.com/ubuntu gutsy-security main restricted universe multiverse
deb http://mirror.lupaworld.com/ubuntu gutsy-updates main restricted universe multiverse
deb http://mirror.lupaworld.com/ubuntu gutsy-backports main restricted universe multiverse
deb-src http://mirror.lupaworld.com/ubuntu gutsy main restricted universe multiverse
deb-src http://mirror.lupaworld.com/ubuntu gutsy-security main restricted universe multiverse
deb-src http://mirror.lupaworld.com/ubuntu gutsy-updates main restricted universe multiverse
deb-src http://mirror.lupaworld.com/ubuntu gutsy-backports main restricted universe multiverse
中國電信源科技大學的源（能用速度還不 錯）
deb http://ubuntu.uestc.edu.cn/ubuntu/ intrepid main restricted universe multiverse
deb http://ubuntu.uestc.edu.cn/ubuntu/ intrepid-backports main restricted universe multiverse
deb http://ubuntu.uestc.edu.cn/ubuntu/ intrepid-proposed main restricted universe multiverse
deb http://ubuntu.uestc.edu.cn/ubuntu/ intrepid-security main restricted universe multiverse
deb http://ubuntu.uestc.edu.cn/ubuntu/ hardy-updates main restricted universe multiverse
deb-src http://ubuntu.uestc.edu.cn/ubuntu/ intrepid main restricted universe multiverse
deb-src http://ubuntu.uestc.edu.cn/ubuntu/ intrepid-backports main restricted universe multiverse
deb-src http://ubuntu.uestc.edu.cn/ubuntu/ intrepid-proposed main restricted universe multiverse
deb-src http://ubuntu.uestc.edu.cn/ubuntu/ intrepid-security main restricted universe multiverse
deb-src http://ubuntu.uestc.edu.cn/ubuntu/ intrepid-updates main restricted universe multiverse
速度還不錯。