Usage:
docker [OPTIONS] COMMAND [arg...]
       docker daemon [ --help | ... ]
       docker [ --help | -v | --version ]
A
self-sufficient runtime for containers.

Options:
  --config=~/.docker              Location of client config files  #Location of client profile
  -D, --debug=false               Enable debug mode  #Enable Debug debugging mode
  -H, --host=[]                   Daemon socket(s) to connect to  #Socket connection of Daemons
  -h, --help=false                Print usage  #Print use
  -l, --log-level=info            Set the logging level  #Set log level
  --tls=false                     Use TLS; implied by--tlsverify  #
  --tlscacert=~/.docker/ca.pem    Trust certs signed only by this CA  #Trust certificate signing CA
  --tlscert=~/.docker/cert.pem    Path to TLS certificate file  #TLS certificate file path
  --tlskey=~/.docker/key.pem      Path to TLS key file  #TLS key file path
  --tlsverify=false               Use TLS and verify the remote  #Remote authentication using TLS
  -v, --version=false             Print version information and quit  #Print version information and exit

Commands:
    attach    Attach to a running container  #The attach connection under the current shell specifies the running image
    build     Build an image from a Dockerfile  #Customizing image through Dockerfile
    commit    Create a new image from a container's changes  #Commit the current container as a new mirror
    cp    Copy files/folders from a container to a HOSTDIR or to STDOUT  #Copy the specified file or directory from the container to the host
    create    Create a new container  #Create a new container, the same as run but do not start the container
    diff    Inspect changes on a container's filesystem  #View docker container changes
    events    Get real time events from the server#Get container real-time events from docker service
    exec    Run a command in a running container#Run command on an existing container
    export    Export a container's filesystem as a tar archive  #Export the content stream of the container as a tar Archive (corresponding to import)
    history    Show the history of an image  #Show the history of the formation of a mirror image
    images    List images  #List the current image of the system
    import    Import the contents from a tarball to create a filesystem image  #Create a new file system image from the contents of the tar package (corresponding to export)
    info    Display system-wide information  #Display system related information
    inspect    Return low-level information on a container or image  #View container details
    kill    Kill a running container  #kill specifies the docker container
    load    Load an image from a tar archive or STDIN  #Load a mirror from a tar package (corresponding to save)
    login    Register or log in to a Docker registry#Register or log in to a docker source server
    logout    Log out from a Docker registry  #Exit from the current Docker registry
    logs    Fetch the logs of a container  #Output current container log information
    pause    Pause all processes within a container#Pause container
    port    List port mappings or a specific mapping for the CONTAINER  #View the container internal source port corresponding to the mapped port
    ps    List containers  #List containers
    pull    Pull an image or a repository from a registry  #Pull the specified image or library image from the docker image source server
    push    Push an image or a repository to a registry  #Push the specified image or library image to the docker source server
    rename    Rename a container  #Rename container
    restart    Restart a running container  #Restart running container
    rm    Remove one or more containers  #Remove one or more containers
    rmi    Remove one or more images  #Remove one or more mirrors (the mirror can only be deleted if there is no container, otherwise the related containers need to be deleted before continuing or - f forces deletion)
    run    Run a command in a new container  #Create a new container and run a command
    save    Save an image(s) to a tar archive#Save an image as a tar package (corresponding to load)
    search    Search the Docker Hub for images  #Searching for images in dockerhub
    start    Start one or more stopped containers#Starting container
    stats    Display a live stream of container(s) resource usage statistics  #Statistics container usage resources
    stop    Stop a running container  #Stop container
    tag         Tag an image into a repository  #Label the image in the source
    top       Display the running processes of a container #View process information running in the container
    unpause    Unpause all processes within a container  #Unsuspend container
    version    Show the Docker version information#View container version number
    wait         Block until a container stops, then print its exit code  #Intercepts the exit status value when the container stops

Run 'docker COMMAND --help' for more information on a command.  #You can get more information by running the docker command in help

docker run create container

• For example, if I want to start a centos container, the host's / test directory can be attached to the container's / soft directory, which can be specified in the following ways:

• docker run -it -v /test:/soft centos /bin/bash

docker update update docker configuration

• Modify container to auto start

• docker container update --restart=always container name

docker exec enters the container

• Enter container internal command

• docker exec -it container id /bin/bash

docker ps -s view container size

• FROM specifies the base image
  RUN execute command
  RUN, such as RUN echo '< H1 > Hello, docker! < H1 >' > / usr / share / nginx / HTML / index.html
  RUN [executable, Parameter1, parameter2]
  COPY copy file
  Copy [-- chown = < user >: < group >] ["< source path 1 >", "..." < target path > "]
  The source path can be multiple, or even wildcard, and its wildcard rule should meet the filepath.Match rule of Go
  ADD more advanced copy file
  ADD and COPY are basically the same. The difference is that if the ADD source path can be a url, and if the < source path > is a tar compressed file, and the compression format is gzip, bzip2 and xz, the ADD instruction will automatically decompress the compressed file to < target path >.
  In the official Dockerfile best practice document of Docker, it is required to use COPY as much as possible, because the semantics of COPY is very clear, that is, copying files, while ADD contains more complex functions, and its behavior is not necessarily very clear. The most suitable situation to use ADD is the one mentioned that needs automatic decompression.
  CMD container start command
  ENTRYPOINT entry point
  The purpose of ENTRYPOINT is the same as that of CMD, which specifies the container startup program and parameters.
  When ENTRYPOINT is specified, the meaning of CMD changes. Instead of running its command directly, the content of CMD is passed to the ENTRYPOINT command as a parameter
  ENV setting environment variable
  ARG build parameters
  VOLUME define anonymous VOLUME
  EXPOSE port