网站服务器切换回国内机房之后就是各种不适应，早上安装 Docker, 一直提示
Get:1 https://apt.dockerproject.org/repo ubuntu-xenial/main amd64 docker-engine amd64 1.11.2-0~xenial [14.5 MB]
Err:1 https://apt.dockerproject.org/repo ubuntu-xenial/main amd64 docker-engine amd64 1.11.2-0~xenial
Operation too slow. Less than 10 bytes/sec transferred the last 120 seconds
E: Failed to fetch https://apt.dockerproject.org/repo/pool/main/d/docker-engine/docker-engine\_1.11.2-0~xenial\_amd64.deb Operation too slow. Less than 10 bytes/sec transferred the last 120 seconds
E: Unable to fetch some archives, maybe run a-get update or try with --fix-missing?
调查后发现是因为 docker 把相关文件放在了 Amazon S3 上，国内只能时好时不好。原因大家都懂
直接修改 “/etc/apt/apt.conf” 文件，配合 Shadowsocks 使用。
Acquire::http::proxy "http://127.0.0.1:1080/";
Acquire::ftp::proxy "ftp://127.0.0.1:1080/";
Acquire::https::proxy "https://127.0.0.1:1080/";
另外，apt-get 也有一个 “-o” 选项，直接跟 apt-get 的设置变量，就不用指定配置文件了，比如
sudo apt-get -o Acquire::http::proxy="http://127.0.0.1:1080/”
其他安装方法 http://get.daocloud.io/#install-docker
参考 http://blog.csdn.net/sww\_simpcity/article/details/8776098