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Ubuntu系统自带的源都是国外的网址，下载非常慢，所以将国外源更换为国内源

备份原来的源

sudo cp /etc/apt/sources.list /etc/apt/sources.list.bak

更换源

sudo gedit /etc/apt/sources.list

使用gedit打开文档，将下边的阿里源复制进去，然后点击保存关闭。

阿里源

deb http://mirrors.aliyun.com/ubuntu/ trusty main restricted universe multiverse  deb http://mirrors.aliyun.com/ubuntu/ trusty-security main restricted universe multiverse  deb http://mirrors.aliyun.com/ubuntu/ trusty-updates main restricted universe multiverse  deb http://mirrors.aliyun.com/ubuntu/ trusty-proposed main restricted universe multiverse  deb http://mirrors.aliyun.com/ubuntu/ trusty-backports main restricted universe multiverse  deb-src http://mirrors.aliyun.com/ubuntu/ trusty main restricted universe multiverse  deb-src http://mirrors.aliyun.com/ubuntu/ trusty-security main restricted universe multiverse  deb-src http://mirrors.aliyun.com/ubuntu/ trusty-updates main restricted universe multiverse  deb-src http://mirrors.aliyun.com/ubuntu/ trusty-proposed main restricted universe multiverse  deb-src http://mirrors.aliyun.com/ubuntu/ trusty-backports main restricted universe multiverse

更新

更新源

sudo apt-get update

更新软件

sudo apt-get upgrade

其他常用源

西电源（只有校内网网线使用，但是不限制流量，还是十分靠谱的）

deb http://linux.xidian.edu.cn/mirrors/ubuntu/ xenial main restricted universe multiverse#deb-src http://linux.xidian.edu.cn/mirrors/ubuntu/ xenial main restricted universe multiversedeb http://linux.xidian.edu.cn/mirrors/ubuntu/ xenial-security main restricted universe multiverse#deb-src http://linux.xidian.edu.cn/mirrors/ubuntu/ xenial-security main restricted universe multiversedeb http://linux.xidian.edu.cn/mirrors/ubuntu/ xenial-updates main restricted universe multiverse#deb-src http://linux.xidian.edu.cn/mirrors/ubuntu/ xenial-updates main restricted universe multiverse#deb http://linux.xidian.edu.cn/mirrors/ubuntu/ xenial-backports main restricted universe multiverse#deb-src http://linux.xidian.edu.cn/mirrors/ubuntu/ xenial-backports main restricted universe multiverse#deb http://linux.xidian.edu.cn/mirrors/ubuntu/ xenial-proposed main restricted universe multiverse#deb-src http://linux.xidian.edu.cn/mirrors/ubuntu/ xenial-proposed main restricted universe multiverse

清华源

deb https://mirrors.tuna.tsinghua.edu.cn/ubuntu/ xenial main restricted universe multiverse# deb-src https://mirrors.tuna.tsinghua.edu.cn/ubuntu/ xenial main restricted universe multiversedeb https://mirrors.tuna.tsinghua.edu.cn/ubuntu/ xenial-updates main restricted universe multiverse# deb-src https://mirrors.tuna.tsinghua.edu.cn/ubuntu/ xenial-updates main restricted universe multiversedeb https://mirrors.tuna.tsinghua.edu.cn/ubuntu/ xenial-backports main restricted universe multiverse# deb-src https://mirrors.tuna.tsinghua.edu.cn/ubuntu/ xenial-backports main restricted universe multiversedeb https://mirrors.tuna.tsinghua.edu.cn/ubuntu/ xenial-security main restricted universe multiverse# deb-src https://mirrors.tuna.tsinghua.edu.cn/ubuntu/ xenial-security main restricted universe multiverse

网易源

deb http://mirrors.163.com/ubuntu/ wily main restricted universe multiversedeb http://mirrors.163.com/ubuntu/ wily-security main restricted universe multiversedeb http://mirrors.163.com/ubuntu/ wily-updates main restricted universe multiversedeb http://mirrors.163.com/ubuntu/ wily-proposed main restricted universe multiversedeb http://mirrors.163.com/ubuntu/ wily-backports main restricted universe multiversedeb-src http://mirrors.163.com/ubuntu/ wily main restricted universe multiversedeb-src http://mirrors.163.com/ubuntu/ wily-security main restricted universe multiversedeb-src http://mirrors.163.com/ubuntu/ wily-updates main restricted universe multiversedeb-src http://mirrors.163.com/ubuntu/ wily-proposed main restricted universe multiversedeb-src http://mirrors.163.com/ubuntu/ wily-backports main restricted universe multiverse

中科大源

deb https://mirrors.ustc.edu.cn/ubuntu/ bionic main restricted universe multiversedeb-src https://mirrors.ustc.edu.cn/ubuntu/ bionic main restricted universe multiversedeb https://mirrors.ustc.edu.cn/ubuntu/ bionic-updates main restricted universe multiversedeb-src https://mirrors.ustc.edu.cn/ubuntu/ bionic-updates main restricted universe multiversedeb https://mirrors.ustc.edu.cn/ubuntu/ bionic-backports main restricted universe multiversedeb-src https://mirrors.ustc.edu.cn/ubuntu/ bionic-backports main restricted universe multiversedeb https://mirrors.ustc.edu.cn/ubuntu/ bionic-security main restricted universe multiversedeb-src https://mirrors.ustc.edu.cn/ubuntu/ bionic-security main restricted universe multiversedeb https://mirrors.ustc.edu.cn/ubuntu/ bionic-proposed main restricted universe multiversedeb-src https://mirrors.ustc.edu.cn/ubuntu/ bionic-proposed main restricted universe multiverse

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