给ubuntu 更换国内源
<p>在使用UBUNTU更新软件的时候，系统自带的源下载速度特别慢，可以使用下面的方法。</p><p>转载自：https://www.cnblogs.com/zqifa/p/ubuntu-apt-get-1.html</p>
<h2>ubuntu18.04 apt-get换国内源 阿里源 163源 清华源 中科大源</h2>
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<p>服务器上安装了最新的Ubuntu Server 18.04，代号为bionic。使用apt-get命令安装软件时，有时候速度比较慢，有时候会失败。因此考虑用国内的镜像源更换下apt-get的默认源。</p>
<p><strong>ubuntu 查看版本号：</strong><br><strong>lsb_release -a</strong></p>
<p>输出：<br>Distributor ID: Ubuntu<br>Description: Ubuntu 18.04.1 LTS<br>Release: 18.04<br>Codename: bionic<br><strong>其中Codename表示代号。</strong></p>
<p><strong>1.备份系统自带源</strong><br><strong>mv /etc/apt/sources.list /etc/apt/sources.list.bak</strong></p>
<p><strong>2.修改/etc/apt/sources.list文件，加入想替换的国内源，我使用的是阿里云的源</strong><br><strong>vi /etc/apt/sources.list</strong></p>
<p>由于服务器的版本是18.04，因此源地址的代号部分都是bionic，如果是其他版本，可以替换为对应的版本，具体版本代号可以网上查找。</p>
<p><br><strong>##阿里源</strong><br>deb http://mirrors.aliyun.com/ubuntu/ bionic main restricted universe multiverse<br>deb http://mirrors.aliyun.com/ubuntu/ bionic-security main restricted universe multiverse<br>deb http://mirrors.aliyun.com/ubuntu/ bionic-updates main restricted universe multiverse<br>deb http://mirrors.aliyun.com/ubuntu/ bionic-proposed main restricted universe multiverse<br>deb http://mirrors.aliyun.com/ubuntu/ bionic-backports main restricted universe multiverse<br>deb-src http://mirrors.aliyun.com/ubuntu/ bionic main restricted universe multiverse<br>deb-src http://mirrors.aliyun.com/ubuntu/ bionic-security main restricted universe multiverse<br>deb-src http://mirrors.aliyun.com/ubuntu/ bionic-updates main restricted universe multiverse<br>deb-src http://mirrors.aliyun.com/ubuntu/ bionic-proposed main restricted universe multiverse<br>deb-src http://mirrors.aliyun.com/ubuntu/ bionic-backports main restricted universe multiverse</p>
<p><strong>##163源</strong><br>deb http://mirrors.163.com/ubuntu/ bionic main restricted universe multiverse<br>deb http://mirrors.163.com/ubuntu/ bionic-security main restricted universe multiverse<br>deb http://mirrors.163.com/ubuntu/ bionic-updates main restricted universe multiverse<br>deb http://mirrors.163.com/ubuntu/ bionic-proposed main restricted universe multiverse<br>deb http://mirrors.163.com/ubuntu/ bionic-backports main restricted universe multiverse<br>deb-src http://mirrors.163.com/ubuntu/ bionic main restricted universe multiverse<br>deb-src http://mirrors.163.com/ubuntu/ bionic-security main restricted universe multiverse<br>deb-src http://mirrors.163.com/ubuntu/ bionic-updates main restricted universe multiverse<br>deb-src http://mirrors.163.com/ubuntu/ bionic-proposed main restricted universe multiverse<br>deb-src http://mirrors.163.com/ubuntu/ bionic-backports main restricted universe multiverse</p>
<p><strong>##清华源</strong><br>deb https://mirrors.tuna.tsinghua.edu.cn/ubuntu/ bionic main restricted universe multiverse<br>deb-src https://mirrors.tuna.tsinghua.edu.cn/ubuntu/ bionic main restricted universe multiverse<br>deb https://mirrors.tuna.tsinghua.edu.cn/ubuntu/ bionic-updates main restricted universe multiverse<br>deb-src https://mirrors.tuna.tsinghua.edu.cn/ubuntu/ bionic-updates main restricted universe multiverse<br>deb https://mirrors.tuna.tsinghua.edu.cn/ubuntu/ bionic-backports main restricted universe multiverse<br>deb-src https://mirrors.tuna.tsinghua.edu.cn/ubuntu/ bionic-backports main restricted universe multiverse<br>deb https://mirrors.tuna.tsinghua.edu.cn/ubuntu/ bionic-security main restricted universe multiverse<br>deb-src https://mirrors.tuna.tsinghua.edu.cn/ubuntu/ bionic-security main restricted universe multiverse<br>deb https://mirrors.tuna.tsinghua.edu.cn/ubuntu/ bionic-proposed main restricted universe multiverse<br>deb-src https://mirrors.tuna.tsinghua.edu.cn/ubuntu/ bionic-proposed main restricted universe multiverse</p>
<p><strong>##中科大源</strong><br>deb https://mirrors.ustc.edu.cn/ubuntu/ bionic main restricted universe multiverse<br>deb-src https://mirrors.ustc.edu.cn/ubuntu/ bionic main restricted universe multiverse<br>deb https://mirrors.ustc.edu.cn/ubuntu/ bionic-updates main restricted universe multiverse<br>deb-src https://mirrors.ustc.edu.cn/ubuntu/ bionic-updates main restricted universe multiverse<br>deb https://mirrors.ustc.edu.cn/ubuntu/ bionic-backports main restricted universe multiverse<br>deb-src https://mirrors.ustc.edu.cn/ubuntu/ bionic-backports main restricted universe multiverse<br>deb https://mirrors.ustc.edu.cn/ubuntu/ bionic-security main restricted universe multiverse<br>deb-src https://mirrors.ustc.edu.cn/ubuntu/ bionic-security main restricted universe multiverse<br>deb https://mirrors.ustc.edu.cn/ubuntu/ bionic-proposed main restricted universe multiverse<br>deb-src https://mirrors.ustc.edu.cn/ubuntu/ bionic-proposed main restricted universe multiverse</p>
<p><br><strong>3.更新生效</strong><br><strong>apt-get update</strong><br><strong>apt-get upgrade</strong></p>
<p> </p>
<p>done!</p>
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来源：https://www.cnblogs.com/dede369/p/14415813.html
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