1 . 备份
cd /etc/apt
sudo cp sources-list sources-list.bak
2 . 编辑
这里用了阿里云的源
sudo vi sources-list
将文件内容替换成以下：
deb http://mirrors.aliyun.com/ubuntu/ vivid main restricted universe multiverse
deb http://mirrors.aliyun.com/ubuntu/ vivid-security main restricted universe multiverse
deb http://mirrors.aliyun.com/ubuntu/ vivid-updates main restricted universe multiverse
deb http://mirrors.aliyun.com/ubuntu/ vivid-proposed main restricted universe multiverse
deb http://mirrors.aliyun.com/ubuntu/ vivid-backports main restricted universe multiverse
deb-src http://mirrors.aliyun.com/ubuntu/ vivid main restricted universe multiverse
deb-src http://mirrors.aliyun.com/ubuntu/ vivid-security main restricted universe multiverse
deb-src http://mirrors.aliyun.com/ubuntu/ vivid-updates main restricted universe multiverse
deb-src http://mirrors.aliyun.com/ubuntu/ vivid-proposed main restricted universe multiverse
deb-src http://mirrors.aliyun.com/ubuntu/ vivid-backports main restricted universe multiverse
3 . 更新
sudo apt-get updata
更新pip源
1 . 可以直接在pip时加入参数
比如：
pip install -i https://pypi.tuna.tsinghua.edu.cn/simple mysqldb
2 . 修改默认设置
在根目录下创建.pip目录，创建pip.conf,并写入
[global] index-url = http://pypi.douban.com/simple [install] trusted-host=pypi.douban.com