Ubuntu12.04 更新源

1、首先备份Ubuntu 12.04源列表  sudo cp /etc/apt/sources.list /etc/apt/sources.list.backup （备份下当前的源列表，有备无患嘛）  2、修改更新源  sudo gedit /etc/apt/sources.list （打开Ubuntu 12.04源列表文件）  3、将下面的代码粘贴进去（“#”开头的那一行为注释，可以直接复制进文件中） 4、通知ubuntu启用新的更新源   sudo apt-get update #台湾源  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  #网易 Ubuntu 12.04 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 

#骨头源，骨头源是bones7456架设的一个Ubuntu源 ，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（推荐）:  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  #电子科技大学  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  #中国科技大学  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  #北京理工大学  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  #兰州大学  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  #上海交通大学  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    大家直接wget http://www.nightc.com/tool/sources.list就可以下载了 别忘了 sudo apt-get dist-upgrade