# Uninstall old versions
 sudo apt-get remove docker docker-engine docker.io containerd runc
#Set up the repository
#Update the apt package index and install packages to allow apt to use a repository over HTTPS:

 sudo apt-get update -y
 sudo apt-get install \
    ca-certificates \
    curl \
    gnupg \
    lsb-release


 curl -fsSL https://download.docker.com/linux/ubuntu/gpg | sudo gpg --dearmor -o /usr/share/keyrings/docker-archive-keyring.gpg


 echo \
  "deb [arch=$(dpkg --print-architecture) signed-by=/usr/share/keyrings/docker-archive-keyring.gpg] https://download.docker.com/linux/ubuntu \
  $(lsb_release -cs) stable" | sudo tee /etc/apt/sources.list.d/docker.list > /dev/null

 sudo apt-get update -y 
 sudo apt-get install docker-ce docker-ce-cli containerd.io

service docker start
 sudo systemctl enable docker
 
sudo docker run hello-world

# -a :提交的镜像作者；
# -c :使用Dockerfile指令来创建镜像；
# -m :提交时的说明文字；
# -p :在commit时，将容器暂停。
docker commit -a "author" -m "commit msg" {commitId} {name}:{tag}
#docker commit -a "author" -m "commit msg" {commitId} author/myubuntu:v1

docker login

docker push author/myubuntu:v1

docker tag {imageId} {name}:{tag}

docker run --name nginx-text -p 9090:90 -d nginx