ubuntu16.04 下更换源和 pip源
一，更换系统源：
首先备份系统源
sudo cp /etc/apt/sources-list /etc/apt/sources-list.bak
将sources-list更换成下面的源
清华大学源：
deb https://mirrors.tuna.tsinghua.edu.cn/ubuntu/ xenial main restricted
deb https://mirrors.tuna.tsinghua.edu.cn/ubuntu/ xenial-updates main restricted
deb https://mirrors.tuna.tsinghua.edu.cn/ubuntu/ xenial universe
deb https://mirrors.tuna.tsinghua.edu.cn/ubuntu/ xenial-updates universe
deb https://mirrors.tuna.tsinghua.edu.cn/ubuntu/ xenial multiverse
deb https://mirrors.tuna.tsinghua.edu.cn/ubuntu/ xenial-updates multiverse
deb https://mirrors.tuna.tsinghua.edu.cn/ubuntu/ xenial-backports main restricted universe multiverse
deb https://mirrors.tuna.tsinghua.edu.cn/ubuntu/ xenial-security main restricted
deb https://mirrors.tuna.tsinghua.edu.cn/ubuntu/ xenial-security universe
deb https://mirrors.tuna.tsinghua.edu.cn/ubuntu/ xenial-security multiverse
更新下源
sudo apt-get update
二，更换pip源
在用户目录下创建.pip文件夹，并创建pip.conf文件
1 [global] 2 trusted-host = pypi.mirrors.ustc.edu.cn 3 index-url = https://pypi.mirrors.ustc.edu.cn/simple
