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uname -r
#输出
3.10.0-862.14.4.el7.x86_64

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yum -y update

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useradd docker

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passwd docker

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curl -fsSL https://get.docker.com/ | sh

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usermod -aG docker docker

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systemctl start docker
systemctl enable docker

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su docker

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docker pull hello-world

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docker run hello-world

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Hello from Docker!
This message shows that your installation appears to be working correctly.
To generate this message, Docker took the following steps:
1. The Docker client contacted the Docker daemon.
2. The Docker daemon pulled the "hello-world" image from the Docker Hub.
(amd64)
3. The Docker daemon created a new container from that image which runs the
executable that produces the output you are currently reading.
4. The Docker daemon streamed that output to the Docker client, which sent it
to your terminal.
To try something more ambitious, you can run an Ubuntu container with:
$ docker run -it ubuntu bash
Share images, automate workflows, and more with a free Docker ID:
https://hub.docker.com/
For more examples and ideas, visit:
https://docs.docker.com/get-started/

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docker
--version

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curl -L https://github.com/docker/compose/releases/download/1.23.2/docker-compose-`uname -s`-`uname -m` -o /usr/local/bin/docker-compose
chmod +x /usr/local/bin/docker-compose

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docker-compose --version

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docker rmi -f $(docker images -qa)

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docker system prune --volumes
docker system prune -a

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docker image rm -f IMAGE ID
案例
docker image rm -f bcb0d5f1f539