Install Ubuntu dual System series--replacement source

Ubuntu has a very useful command apt-get, it can help you to download the software, also can install, download and install the command is Apt-get install.

That Ubuntu by default is where to download the software, this can view the file/etc/apt/sources.list

But people often want to download software from a closer place, like their own school, their own company, so we need to replace the default source.

1. Backup Source Configuration file
sudo cp/etc/apt/sources.list/etc/apt/sources.list_backup

2. Edit the source configuration file
Vim/etc/apt/sources.list
Delete everything, just keep the topmost comment (because it is not available because you are afraid of formatting problems, so you want to keep the formatting.) )

3, to find the source of matching their own system, Baidu on a search a lot. Note to match your system, before you change the new source, check to see if the source you want to replace is really there. I remember I wanted to change the source of 14.10, online a lot, but the reality is not there.

For example, I find a 12.04 version of the source:

#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 universe4, copy the above into the Sources.list file, and then refresh the list: #sudo apt-get update

Install Ubuntu dual System series--replacement source