operation

# docker ps # list containers
# systemctl restart docker # restart docker on centos 7

install docker ( Docker Community Edition (Docker CE) ) on ubuntu 16.04

https://docs.docker.com/engine/installation/linux/docker-ce/ubuntu/

sudo apt-get update
sudo apt-get install \
    linux-image-extra-$(uname -r) \
    linux-image-extra-virtual

sudo apt-get update
sudo apt-get install \
    apt-transport-https \
    ca-certificates \
    curl \
    software-properties-common
curl -fsSL https://download.docker.com/linux/ubuntu/gpg | sudo apt-key add -

Verify that the key fingerprint is 9DC8 5822 9FC7 DD38 854A E2D8 8D81 803C 0EBF CD88

sudo apt-key fingerprint 0EBFCD88

sudo add-apt-repository \
   "deb [arch=amd64] https://download.docker.com/linux/ubuntu \
   $(lsb_release -cs) \
   stable"

sudo apt-get update
sudo apt-get install docker-ce

install docker on CentOS 7

https://docs.docker.com/engine/installation/linux/docker-ce/centos/

中国大陆用户请注意，可以使用清华大学的镜像：

https://yq.aliyun.com/articles/110806

sudo yum install -y yum-utils device-mapper-persistent-data lvm2

sudo yum-config-manager \
    --add-repo \
    https://download.docker.com/linux/centos/docker-ce.repo

will create /etc/yum.repos.d/docker-ce.repo

sudo yum makecache fast

select a version to install

sudo yum list docker-ce.x86_64  --showduplicates | sort -r
 * updates: mirrors.aliyun.com
Loading mirror speeds from cached hostfile
Loaded plugins: fastestmirror
 * extras: mirrors.aliyun.com
 * epel: mirrors.aliyun.com
docker-ce.x86_64            17.06.0.ce-1.el7.centos             docker-ce-stable
docker-ce.x86_64            17.03.2.ce-1.el7.centos             docker-ce-stable
docker-ce.x86_64            17.03.1.ce-1.el7.centos             docker-ce-stable
docker-ce.x86_64            17.03.0.ce-1.el7.centos             docker-ce-stable
 * base: mirrors.aliyun.com
Available Packages

sudo yum install -y docker-ce-17.06.0.ce-1.el7.centos

Verify that the fingerprint is correct, and if so, accept the key. The fingerprint should match 060A 61C5 1B55 8A7F 742B 77AA C52F EB6B 621E 9F35.

Retrieving key from https://download.docker.com/linux/centos/gpg
Importing GPG key 0x621E9F35:
 Userid     : "Docker Release (CE rpm) <docker@docker.com>"
 Fingerprint: 060a 61c5 1b55 8a7f 742b 77aa c52f eb6b 621e 9f35
 From       : https://download.docker.com/linux/centos/gpg
Is this ok [y/N]: y

sudo systemctl start docker

sudo docker run hello-world