ubuntu安装好后设置更新URL

1、打开配置更新URL的配置文件

在终端输入命令： gedit /etc/apt/sources.list

2、删除sources.list文件的内容，把下列的更新源URL复制到文件中

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

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

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

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

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

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

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

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

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

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

3、保存关闭文件

4、在终端输入命令： sudo apt-get update 更新(注：必须执行这个命令，否则更新源不启作用)