Ubuntu 12.04 update source

1. First back up the ubuntu12.04 source list

 
Sudo CP/Etc/APT/sources. LIST/etc/APT/sources. List. Backup (backup the current source list)
 

 

2. Modify the update source

 
SudoGedit/etc/APT/sources. List (Open Ubuntu12. 04 source list files)
 

 

3. Replace the list in with the following list.

163 Source

Deb http: //  Mirrors.163.com/ubuntu/ precise main restricted Deb-Src http: //  Mirrors.163.com/ubuntu/ precise main restricted Deb http: // Mirrors.163.com/ubuntu/ precise-Updates main restricted Deb-Src http: //  Mirrors.163.com/ubuntu/ precise-Updates main restricted Deb http: //  Mirrors.163.com/ubuntu/ precise universe Deb-Src http: //  Mirrors.163.com/ubuntu/ precise universe Deb http: //  Mirrors.163.com/ubuntu/ precise-Updates universe Deb-Src http: //  Mirrors.163.com/ubuntu/ precise-Updates universe Deb http: //  Mirrors.163.com/ubuntu/ precise multiverse Deb-Src http: //  Mirrors.163.com/ubuntu/ precise multiverse Deb http: //  Mirrors.163.com/ubuntu/ precise-Updates multiverse Deb-Src http: //  Mirrors.163.com/ubuntu/ precise-Updates multiverse Deb http: //  Mirrors.163.com/ubuntu/ precise-backports main restricted universe multiverse Deb-Src http: // Mirrors.163.com/ubuntu/ precise-backports main restricted universe multiverse Deb http: //  Mirrors.163.com/ubuntu/ precise-security main restricted Deb-Src http: //  Mirrors.163.com/ubuntu/ precise-security main restricted Deb http: //  Mirrors.163.com/ubuntu/ precise-security universe Deb-Src http: //  Mirrors.163.com/ubuntu/ precise-security universe Deb http: // Mirrors.163.com/ubuntu/ precise-security multiverse Deb-Src http: //  Mirrors.163.com/ubuntu/ precise-security multiverse Deb http: //  Extras.ubuntu.com/ubuntu precise main Deb-Src http: //  Extras.ubuntu.com/ubuntu precise main 

 

Sohu Source

Deb http: //  Mirrors.sohu.com/ubuntu/ precise main restricted Deb-Src http: // Mirrors.sohu.com/ubuntu/ precise main restricted Deb http: //  Mirrors.sohu.com/ubuntu/ precise-Updates main restricted Deb-Src http: //  Mirrors.sohu.com/ubuntu/ precise-Updates main restricted Deb http: //  Mirrors.sohu.com/ubuntu/ precise universe Deb-Src http: //  Mirrors.sohu.com/ubuntu/ precise universe Deb http: //  Mirrors.sohu.com/ubuntu/ precise-Updates universe Deb-Src http: //  Mirrors.sohu.com/ubuntu/ precise-Updates universe Deb http: //  Mirrors.sohu.com/ubuntu/ precise multiverse Deb-Src http: //  Mirrors.sohu.com/ubuntu/ precise multiverse Deb http: //  Mirrors.sohu.com/ubuntu/ precise-Updates multiverse Deb-Src http: //  Mirrors.sohu.com/ubuntu/ precise-Updates multiverse Deb http: // Mirrors.sohu.com/ubuntu/ precise-backports main restricted universe multiverse Deb-Src http: //  Mirrors.sohu.com/ubuntu/ precise-backports main restricted universe multiverse Deb http: //  Mirrors.sohu.com/ubuntu/ precise-security main restricted Deb-Src http: //  Mirrors.sohu.com/ubuntu/ precise-security main restricted Deb http: //  Mirrors.sohu.com/ubuntu/ precise-security universe Deb-Src http: // Mirrors.sohu.com/ubuntu/ precise-security universe Deb http: //  Mirrors.sohu.com/ubuntu/ precise-security multiverse Deb-Src http: //  Mirrors.sohu.com/ubuntu/ precise-security multiverse Deb http: //  Extras.ubuntu.com/ubuntu precise main Deb-Src http: //  Extras.ubuntu.com/ubuntu precise main 

 

Ubuntu.cn99.com source (recommended ):

Deb http://Ubuntu.cn99.com/ubuntu/ precise main restricted universe multiverseDeb http://Ubuntu.cn99.com/ubuntu/ precise-Updates main restricted universe multiverseDeb http://Ubuntu.cn99.com/ubuntu/ precise-security main restricted universe multiverseDeb http://Ubuntu.cn99.com/ubuntu/ precise-backports main restricted universe multiverseDeb http://Ubuntu.cn99.com/ubuntu-cn/ precise main restricted universe multiverse
 

 

Educational network source
If you are a college student, you can use the Campus Network/education network, that is, use the resources of education network, especially for IPv6 support, then the update speed will be calculated by megabytes.

# University of Electronic Science and Technology

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 

 

# Emy of Science and Technology

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 

 

# Beijing Institute of Technology

Deb http: //  2.16.bjtu.edu.cn/ubuntu/ precise main multiverse restricted universe Deb http: //  2.16.bjtu.edu.cn/ubuntu/ precise-backports main multiverse restricted universe Deb http: // 2.16.bjtu.edu.cn/ubuntu/ precise-proposed main multiverse restricted universe Deb http: //  2.16.bjtu.edu.cn/ubuntu/ precise-security main multiverse restricted universe Deb http: //  2.16.bjtu.edu.cn/ubuntu/ precise-Updates main multiverse restricted universe Deb-Src http: //  2.16.bjtu.edu.cn/ubuntu/ precise main multiverse restricted universe Deb-Src http: //  2.16.bjtu.edu.cn/ubuntu/ precise-backports main multiverse restricted universe Deb-Src http://  2.16.bjtu.edu.cn/ubuntu/ precise-proposed main multiverse restricted universe Deb-Src http: //  2.16.bjtu.edu.cn/ubuntu/ precise-security main multiverse restricted universe Deb-Src http: //  2.16.bjtu.edu.cn/ubuntu/ precise-Updates main multiverse restricted universe 

 

4. Update Source

 
SudoApt-Get update