Ubuntu系統自帶的源都是國外的網址，國內用戶在使用的時候網速比較慢。一個軟件的下載是十分痛苦的，這里講解一下如何將國外源更換為國內源，讓你的網速Biu.Biu.Biu。
更換apt-get數據源
1.備份原先的源
sudo cp /etc/apt/sources.list ?/etc/apt/sources.list.back_20181007
將以前的源備份一下，以防以后可以用的。
2.更換源
sudo gedit /etc/apt/sources.list
使用gedit打開文檔，將下邊的阿里源復制進去，然后點擊保存關閉。
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
3.更新源與軟件
更新源
sudo apt-get update
更新軟件
sudo apt-get upgrade
4.其他常用源
西電源（只有校內網網線使用，但是不限制流量，還是十分靠譜的）
deb http://linux.xidian.edu.cn/mirrors/ubuntu/ xenial main restricted universe multiverse#deb-srchttp://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-srchttp://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-srchttp://linux.xidian.edu.cn/mirrors/ubuntu/ xenial-updates main restricted universe multiverse#debhttp://linux.xidian.edu.cn/mirrors/ubuntu/ xenial-backports main restricted universe multiverse#deb-srchttp://linux.xidian.edu.cn/mirrors/ubuntu/ xenial-backports main restricted universe multiverse#debhttp://linux.xidian.edu.cn/mirrors/ubuntu/ xenial-proposed main restricted universe multiverse#deb-srchttp://linux.xidian.edu.cn/mirrors/ubuntu/ xenial-proposed main restricted universe multiverse
清華源
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
網易源
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-srchttp://mirrors.163.com/ubuntu/ wily main restricted universe multiversedeb-srchttp://mirrors.163.com/ubuntu/ wily-security main restricted universe multiversedeb-srchttp://mirrors.163.com/ubuntu/ wily-updates main restricted universe multiversedeb-srchttp://mirrors.163.com/ubuntu/ wily-proposed main restricted universe multiversedeb-srch????ttp://mirrors.163.com/ubuntu/ wily-backports main restricted universe multiverse
? 參考網址:https://blog.csdn.net/qq_35451572/article/details/79516563
更換pip數據源
1.根目錄創建.pip文件
mkdir ~/.pip
2.創建文件pip.conf
vim .pip/pip.conf
3.點擊“i”鍵，進入編輯模式，復制以下信息：
[global]
index-url =?https://pypi.tuna.tsinghua.edu.cn/simple
trusted-host = pypi.tuna.tsinghua.edu.cn
4.點擊：“ESC”切換到命令行模式，輸入“:wq”保存離開。
5.其他常用源
清華大學?https://pypi.tuna.tsinghua.edu.cn/simple/
阿里云?http://mirrors.aliyun.com/pypi/simple/
中國科技大學?https://pypi.mirrors.ustc.edu.cn/simple/
豆瓣(douban)?http://pypi.douban.com/simple/
