如何更换Ubuntu系统软件源

简介

新安装的Ubuntu系统，系统自带的默认软件源在国内安装软件时会很缓慢，甚至无法访问。所以本文简单介绍如何把软件源更换为国内镜像源，以加快访问速度。

方法一： 使用软件源管理工具

新版本的Ubuntu系统(包括Ubuntu系的其他系统)，默认内置了软件源管理工具，可以直接使用工具切换软件源，本文以ZorinOS为例。

打开 软件和更新 GUI 界面，选择下载自下拉框(如下图)，选择其他站点，然后选中中国境内的镜像源地址（如mirrors.ustc.edu.cn）。

点击右下角选择服务器按钮(如下图)，然后点击关闭按钮。

系统将提示可用软件信息已过时(如下图)，点击重新载入按钮，少待片刻即可完成换源。

方法二： 手动修改配置文件

于终端执行以下命令

# 先备份下默认软件源
sudo cp /etc/apt/sources.list /etc/apt/sources.list.backup

# 编辑软件源配置文件
sudo gedit /etc/apt/sources.list

粘贴以下内容覆盖至配置文件

注：也可以使用其他源 (点击展开)

#网易源

deb <http://mirrors.163.com/ubuntu/> focal main restricted universe multiverse
deb <http://mirrors.163.com/ubuntu/> focal-security main restricted universe multiverse
deb <http://mirrors.163.com/ubuntu/> focal-updates main restricted universe multiverse
deb <http://mirrors.163.com/ubuntu/> focal-backports main restricted universe multiverse
# deb-src <http://mirrors.163.com/ubuntu/> focal main restricted universe multiverse
# deb-src <http://mirrors.163.com/ubuntu/> focal-security main restricted universe multiverse
# deb-src <http://mirrors.163.com/ubuntu/> focal-updates main restricted universe multiverse
# deb-src <http://mirrors.163.com/ubuntu/> focal-backports main restricted universe multiverse

#阿里云源

deb <http://mirrors.aliyun.com/ubuntu/> focal main restricted universe multiverse
#deb-src <http://mirrors.aliyun.com/ubuntu/> focal main restricted universe multiverse
deb <http://mirrors.aliyun.com/ubuntu/> focal-security main restricted universe multiverse
#deb-src <http://mirrors.aliyun.com/ubuntu/> focal-security main restricted universe multiverse
deb <http://mirrors.aliyun.com/ubuntu/> focal-updates main restricted universe multiverse
#deb-src <http://mirrors.aliyun.com/ubuntu/> focal-updates main restricted universe multiverse
deb <http://mirrors.aliyun.com/ubuntu/> focal-proposed main restricted universe multiverse
#deb-src <http://mirrors.aliyun.com/ubuntu/> focal-proposed main restricted universe multiverse
deb <http://mirrors.aliyun.com/ubuntu/> focal-backports main restricted universe multiverse
#deb-src <http://mirrors.aliyun.com/ubuntu/> focal-backports main restricted universe multiverse

#清华源

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

#中科大源

deb <https://mirrors.ustc.edu.cn/ubuntu/> focal main restricted universe multiverse
#deb-src <https://mirrors.ustc.edu.cn/ubuntu/> focal main restricted universe multiverse
deb <https://mirrors.ustc.edu.cn/ubuntu/> focal-updates main restricted universe multiverse
#deb-src <https://mirrors.ustc.edu.cn/ubuntu/> focal-updates main restricted universe multiverse
deb <https://mirrors.ustc.edu.cn/ubuntu/> focal-backports main restricted universe multiverse
#deb-src <https://mirrors.ustc.edu.cn/ubuntu/> focal-backports main restricted universe multiverse
deb <https://mirrors.ustc.edu.cn/ubuntu/> focal-security main restricted universe multiverse
#deb-src <https://mirrors.ustc.edu.cn/ubuntu/> focal-security main restricted universe multiverse
deb <https://mirrors.ustc.edu.cn/ubuntu/> focal-proposed main restricted universe multiverse
#deb-src <https://mirrors.ustc.edu.cn/ubuntu/> focal-proposed main restricted universe multiverse

保存文件，于终端执行以下命令

sudo apt update
sudo apt upgrade