Linux如何更换pip的源和apt-get的源

（1）使用pip install安装Python的相关库时，国外的源速度较慢，修改为国内的源（豆瓣源）

编辑配置文件, 如果没有, 新建一份:

vi ~/.pip/pip.conf  

添加内容如下:

[global]  
index-url = http://pypi.douban.com/simple  
trusted-host = pypi.douban.com  

（2）修改apt-get源（参考：apt-get切换国内源）  

输入下面命令：

sudo cp /etc/apt/sources.list /etc/apt/sources.list.backup
sudo vi /etc/apt/sources.list

之后将文件中源地址修改国内源的地址。（ 源列表 - Ubuntu中文）
Trusty(14.04)版本地址列表：

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 multiverse

之后可以输入下面命令测试一下更新下载速度

sudo apt-get update