1、首先備份Ubuntu 12.04源列表

sudo cp /etc/apt/sources.list /etc/apt/sources.list.backup （備份下當(dāng)前的源列表，有備無患嘛）

2多艇、修改更新源

sudo gedit /etc/apt/sources.list （打開Ubuntu 12.04源列表文件）

3温艇、將下面的代碼粘貼進(jìn)去（“#”開頭的那一行為注釋因悲，可以直接復(fù)制進(jìn)文件中）

4、通知ubuntu啟用新的更新源 sudo apt-get update

#臺(tái)灣源

deb http://tw.archive.ubuntu.com/ubuntu/ precise main universe restricted multiverse

deb-src http://tw.archive.ubuntu.com/ubuntu/ precise main universe restricted multiverse

deb http://tw.archive.ubuntu.com/ubuntu/ precise-security universe main multiverse restricted

deb-src http://tw.archive.ubuntu.com/ubuntu/ precise-security universe main multiverse restricted

deb http://tw.archive.ubuntu.com/ubuntu/ precise-updates universe main multiverse restricted

deb-src http://tw.archive.ubuntu.com/ubuntu/ precise-updates universe main multiverse restricted

#網(wǎng)易 Ubuntu 11.10 源（速度很快）

deb http://mirrors.163.com/ubuntu/ precise main universe restricted multiverse

deb-src http://mirrors.163.com/ubuntu/ precise main universe restricted multiverse

deb http://mirrors.163.com/ubuntu/ precise-security universe main multiverse restricted

deb-src http://mirrors.163.com/ubuntu/ precise-security universe main multiverse restricted

deb http://mirrors.163.com/ubuntu/ precise-updates universe main multiverse restricted

deb http://mirrors.163.com/ubuntu/ precise-proposed universe main multiverse restricted

deb-src http://mirrors.163.com/ubuntu/ precise-proposed universe main multiverse restricted

deb http://mirrors.163.com/ubuntu/ precise-backports universe main multiverse restricted

deb-src http://mirrors.163.com/ubuntu/ precise-backports universe main multiverse restricted

deb-src http://mirrors.163.com/ubuntu/ precise-updates universe main multiverse restricted

#骨頭源勺爱，骨頭源是bones7456架設(shè)的一個(gè)Ubuntu源 晃琳，提供ubuntu,deepin

deb http://ubuntu.srt.cn/ubuntu/ precise main universe restricted multiverse

deb-src http://ubuntu.srt.cn/ubuntu/ precise main universe restricted multiverse

deb http://ubuntu.srt.cn/ubuntu/ precise-security universe main multiverse restricted

deb-src http://ubuntu.srt.cn/ubuntu/ precise-security universe main multiverse restricted

deb http://ubuntu.srt.cn/ubuntu/ precise-updates universe main multiverse restricted

deb http://ubuntu.srt.cn/ubuntu/ precise-proposed universe main multiverse restricted

deb-src http://ubuntu.srt.cn/ubuntu/ precise-proposed universe main multiverse restricted

deb http://ubuntu.srt.cn/ubuntu/ precise-backports universe main multiverse restricted

deb-src http://ubuntu.srt.cn/ubuntu/ precise-backports universe main multiverse restricted

deb-src http://ubuntu.srt.cn/ubuntu/ precise-updates universe main multiverse restricted

#mirror.lupaworld.com的源，速度很快

deb http://mirror.lupaworld.com/ubuntu/archive/ precise main restricted universe multiverse

deb http://mirror.lupaworld.com/ubuntu/archive/ precise-security main restricted universe multiverse

deb http://mirror.lupaworld.com/ubuntu/archive/ precise-updates main restricted universe multiverse

deb http://mirror.lupaworld.com/ubuntu/archive/ precise-backports main restricted universe multiverse

deb http://mirror.lupaworld.com/ubuntu/ubuntu-cn/ precise main restricted universe multiverse

#ubuntu.cn99.com源（推薦）:

deb http://ubuntu.cn99.com/ubuntu/ precise main restricted universe multiverse

deb http://ubuntu.cn99.com/ubuntu/ precise-updates main restricted universe multiverse

deb http://ubuntu.cn99.com/ubuntu/ precise-security main restricted universe multiverse

deb http://ubuntu.cn99.com/ubuntu/ precise-backports main restricted universe multiverse

deb http://ubuntu.cn99.com/ubuntu-cn/ precise main restricted universe multiverse

#電子科技大學(xué)

deb http://ubuntu.uestc.edu.cn/ubuntu/ precise main restricted universe multiverse

deb http://ubuntu.uestc.edu.cn/ubuntu/ precise-backports main restricted universe multiverse

deb http://ubuntu.uestc.edu.cn/ubuntu/ precise-proposed main restricted universe multiverse

deb http://ubuntu.uestc.edu.cn/ubuntu/ precise-security main restricted universe multiverse

deb http://ubuntu.uestc.edu.cn/ubuntu/ precise-updates main restricted universe multiverse

deb-src http://ubuntu.uestc.edu.cn/ubuntu/ precise main restricted universe multiverse

deb-src http://ubuntu.uestc.edu.cn/ubuntu/ precise-backports main restricted universe multiverse

deb-src http://ubuntu.uestc.edu.cn/ubuntu/ precise-proposed main restricted universe multiverse

deb-src http://ubuntu.uestc.edu.cn/ubuntu/ precise-security main restricted universe multiverse

deb-src http://ubuntu.uestc.edu.cn/ubuntu/ precise-updates main restricted universe multiverse

#中國(guó)科技大學(xué)

deb http://debian.ustc.edu.cn/ubuntu/ precise main restricted universe multiverse

deb http://debian.ustc.edu.cn/ubuntu/ precise-backports restricted universe multiverse

deb http://debian.ustc.edu.cn/ubuntu/ precise-proposed main restricted universe multiverse

deb http://debian.ustc.edu.cn/ubuntu/ precise-security main restricted universe multiverse

deb http://debian.ustc.edu.cn/ubuntu/ precise-updates main restricted universe multiverse

deb-src http://debian.ustc.edu.cn/ubuntu/ precise main restricted universe multiverse

deb-src http://debian.ustc.edu.cn/ubuntu/ precise-backports main restricted universe multiverse

deb-src http://debian.ustc.edu.cn/ubuntu/ precise-proposed main restricted universe multiverse

deb-src http://debian.ustc.edu.cn/ubuntu/ precise-security main restricted universe multiverse

deb-src http://debian.ustc.edu.cn/ubuntu/ precise-updates main restricted universe multiverse

#北京理工大學(xué)

deb http://mirror.bjtu.edu.cn/ubuntu/ precise main multiverse restricted universe

deb http://mirror.bjtu.edu.cn/ubuntu/ precise-backports main multiverse restricted universe

deb http://mirror.bjtu.edu.cn/ubuntu/ precise-proposed main multiverse restricted universe

deb http://mirror.bjtu.edu.cn/ubuntu/ precise-security main multiverse restricted universe

deb http://mirror.bjtu.edu.cn/ubuntu/ precise-updates main multiverse restricted universe

deb-src http://mirror.bjtu.edu.cn/ubuntu/ precise main multiverse restricted universe

deb-src http://mirror.bjtu.edu.cn/ubuntu/ precise-backports main multiverse restricted universe

deb-src http://mirror.bjtu.edu.cn/ubuntu/ precise-proposed main multiverse restricted universe

deb-src http://mirror.bjtu.edu.cn/ubuntu/ precise-security main multiverse restricted universe

deb-src http://mirror.bjtu.edu.cn/ubuntu/ precise-updates main multiverse restricted universe

#蘭州大學(xué)

deb ftp://mirror.lzu.edu.cn/ubuntu/ precise main multiverse restricted universe

deb ftp://mirror.lzu.edu.cn/ubuntu/ precise-backports main multiverse restricted universe

deb ftp://mirror.lzu.edu.cn/ubuntu/ precise-proposed main multiverse restricted universe

deb ftp://mirror.lzu.edu.cn/ubuntu/ precise-security main multiverse restricted universe

deb ftp://mirror.lzu.edu.cn/ubuntu/ precise-updates main multiverse restricted universe

deb ftp://mirror.lzu.edu.cn/ubuntu-cn/ precise main multiverse restricted universe

#上海交通大學(xué)

deb http://ftp.sjtu.edu.cn/ubuntu/ precise main multiverse restricted universe

deb http://ftp.sjtu.edu.cn/ubuntu/ precise-backports main multiverse restricted universe

deb http://ftp.sjtu.edu.cn/ubuntu/ precise-proposed main multiverse restricted universe

deb http://ftp.sjtu.edu.cn/ubuntu/ precise-security main multiverse restricted universe

deb http://ftp.sjtu.edu.cn/ubuntu/ precise-updates main multiverse restricted universe

deb http://ftp.sjtu.edu.cn/ubuntu-cn/ precise main multiverse restricted universe

deb-src http://ftp.sjtu.edu.cn/ubuntu/ precise main multiverse restricted universe

deb-src http://ftp.sjtu.edu.cn/ubuntu/ precise-backports main multiverse restricted universe

deb-src http://ftp.sjtu.edu.cn/ubuntu/ precise-proposed main multiverse restricted universe

deb-src http://ftp.sjtu.edu.cn/ubuntu/ precise-security main multiverse restricted universe

deb-src http://ftp.sjtu.edu.cn/ubuntu/ precise-updates main multiverse restricted universe