Ubuntu 16.04 LTS(入门一)国内快速更新软件源

一、源文件位置

备份并替换/etc/apt/sources.list的源内容：

二、更改源文件内容

    sudo gedit /etc/apt/sources.list

    deb http://mirrors.aliyun.com/ubuntu/ xenial main restricted universe multiverse
    deb http://mirrors.aliyun.com/ubuntu/ xenial-security main restricted universe multiverse
    deb http://mirrors.aliyun.com/ubuntu/ xenial-updates main restricted universe multiverse
    deb http://mirrors.aliyun.com/ubuntu/ xenial-backports main restricted universe multiverse
    ##测试版源
    deb http://mirrors.aliyun.com/ubuntu/ xenial-proposed main restricted universe multiverse
    # 源码
    deb-src http://mirrors.aliyun.com/ubuntu/ xenial main restricted universe multiverse
    deb-src http://mirrors.aliyun.com/ubuntu/ xenial-security main restricted universe multiverse
    deb-src http://mirrors.aliyun.com/ubuntu/ xenial-updates main restricted universe multiverse
    deb-src http://mirrors.aliyun.com/ubuntu/ xenial-backports main restricted universe multiverse
    ##测试版源
    deb-src http://mirrors.aliyun.com/ubuntu/ xenial-proposed main restricted universe multiverse
    # Canonical 合作伙伴和附加
    deb http://archive.canonical.com/ubuntu/ xenial partner
    deb http://extras.ubuntu.com/ubuntu/ xenial main