Ubuntu 18.04換國內源

參考文檔： https://blog.csdn.net/zhangjiahao14/article/details/80554616 http://www.javashuo.com/article/p-gkiadycb-gk.html

1.複製源文件備份，以防萬一

咱們要修改的文件是sources.list，它在目錄/etc/apt/下，sources.list是包管理工具apt所用的記錄軟件包倉庫位置的配置文件，一樣類型的還有位於 同目錄下sources.list.d文件下的各類.list後綴的各文件。

命令以下：

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

2.編輯源列表文件

命令以下：

sudo vim /etc/apt/sources.list

3.查看新版本信息

其實Ubuntu18.04版以前的任一版更改apt源爲國內源方法早就有了，內容大同小異，咱們應當掌握其規律了，其實每一版內容不一樣的地方就是版本號（或者官方一點的說：系統代號），因此咱們先了解下新版本的系統代號：

使用以下命令：

lsb_release -c

獲得本系統的系統代號，以下圖所示：

咱們能夠看到新版本的Ubuntu系統代號爲bionic 一樣的咱們也能夠獲得以前任意版本的系統代號:

• Ubuntu 12.04 (LTS)代號爲precise。
• Ubuntu 14.04 (LTS)代號爲trusty。
• Ubuntu 15.04 代號爲vivid。
• Ubuntu 15.10 代號爲wily。
• Ubuntu 16.04 (LTS)代號爲xenial。

因此這也就解釋了爲何咱們百度出來的那麼多方案裏面內容不盡相同的緣由，由於他們更改apt安裝源時用的系統不同。

4. 修改源

將原有的內容註釋掉，添加如下內容（或者你把裏面內容修改爲下面的就能夠，可是不能有除了如下內容的有效內容, 注意，下面給的幾個源，選一個就好）

## 中科大源

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

## 阿里源

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

## 163源

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

## 清華源

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

5. 更新軟件列表

運行以下命令：

sudo apt-get update

6. 更新軟件包

運行以下命令：

sudo apt-get upgrade