根据官方文档安装，但是往https://apt.dockerproject.org/repo下的时候会很卡@H_404_1@

https://docs.docker.com/engine/installation/linux/ubuntulinux/
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http://blog.csdn.net/mickjoust/article/details/51578629
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也可以下载tar包直接解压@H_404_1@

http://get.daocloud.io/#install-docker
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# To install,run the following commands as root: curl -fsSLO https://get.daocloud.io/docker/builds/Linux/x86_64/docker-1.12.6.tgz && tar --strip-components=1 -xvzf docker-1.12.6.tgz -C /usr/local/bin # Then start docker in daemon mode: /usr/local/bin/dockerd @H_404_1@