一、安装
https://docs.docker.com/engine/install/ubuntu/
1.卸载旧版
sudo apt-get remove docker docker-engine docker.io containerd runc
2.install packages to allow apt to use a repository over HTTPS:
sudo apt-get update
sudo apt-get install apt-transport-https ca-certificates curl gnupg-agent software-properties-common
3.Add Docker’s official GPG key:
curl -fsSL https://download.docker.com/linux/ubuntu/gpg | sudo apt-key add -
验证：sudo apt-key fingerprint 0EBFCD88
4.set up the stable repository
sudo add-apt-repository "deb [arch=amd64] https://download.docker.com/linux/ubuntu $(lsb_release -cs) stable"
5.Install Docker Engine
sudo apt-get update
sudo apt-get install docker-ce docker-ce-cli containerd.io
验证：sudo docker run hello-world
更新：sudo apt-get update
二、使用-上传自己的镜像
https://docs.docker.com/docker-hub/
1.注册Docker Hub
2.创一个仓库
3.在Ubuntu上登录
sudo docker login
4.创一个Dockerfile
cat > Dockerfile <<EOF
FROM busybox
CMD echo "Hello world! This is my first Docker image."
EOF
5.build your Docker image
sudo docker build -t <your_username>/my-first-repo .
最后那个点是Dockerfile的路径
6.查看本地有哪些镜像
sudo docker image ls
7.Test your docker image locally
sudo docker run <your_username>/my-first-repo
8. push your Docker image to Docker Hub
docker push <your_username>/my-first-repo
9.退出登录
docker logout
三、使用-使用镜像
https://github.com/docker/labs/blob/master/beginner/chapters/alpine.md
sudo docker pull alpine
sudo docker run alpine ls -l
sudo docker run alpine echo "hello from alpine"
sudo docker run -it alpine /bin/sh
exit
sudo docker ps
sudo docker ps -a