diff --git a/sources/tech/20141127 How to install Docker on CentOS 7.md b/sources/tech/20141127 How to install Docker on CentOS 7.md
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+[translating by KayGuoWhu]
 How to install Docker on CentOS 7
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 Docker is an open-source tool that makes creating & managing **Linux containers(LXC)** easy. Containers are like lightweight VMs which can be started & stopped in milliseconds. Dockers help the system admin & coders to develop their application in a container and can further scale up to 1000 of nodes.