1.查看容器内进程信息
docker top 容器ID
2.查看容器元数据信息，元数据信息是JSON格式的字符串，包含有很多内容，容器的ID、创建时间、状态、数据卷等等。
docker inspect 容器ID
3. 进入当前正在运行的容器
通常运行容器是以后台方式运行的，使用以下命令进入正在运行的容器
docker exec -it 容器 /bin/bash 进入容器后开启一个新的终端，可以在里面操作
docker attach 容器 进入容器正在执行的终端，不会启动新的进程。
- 把容器内文件拷贝到主机
docker cp 容器:容器内路径 主机路径
5.小节
此图包含有镜像的命令，容器命令，帮助信息等等，以下是官方列举的基本命令及描述信息
| docker attach | Attach local standard input, output, and error streams to a running container |
| docker build | Build an image from a Dockerfile |
| docker builder | Manage builds |
| docker checkpoint | Manage checkpoints |
| docker commit | Create a new image from a container’s changes |
| docker config | Manage Docker configs |
| docker container | Manage containers |
| docker context | Manage contexts |
| docker cp | Copy files/folders between a container and the local filesystem |
| docker create | Create a new container |
| docker diff | Inspect changes to files or directories on a container’s filesystem |
| docker events | Get real time events from the server |
| docker exec | Run a command in a running container |
| docker export | Export a container’s filesystem as a tar archive |
| docker history | Show the history of an image |
| docker image | Manage images |
| docker images | List images |
| docker import | Import the contents from a tarball to create a filesystem image |
| docker info | Display system-wide information |
| docker inspect | Return low-level information on Docker objects |
| docker kill | Kill one or more running containers |
| docker load | Load an image from a tar archive or STDIN |
| docker login | Log in to a Docker registry |
| docker logout | Log out from a Docker registry |
| docker logs | Fetch the logs of a container |
| docker manifest | Manage Docker image manifests and manifest lists |
| docker network | Manage networks |
| docker node | Manage Swarm nodes |
| docker pause | Pause all processes within one or more containers |
| docker plugin | Manage plugins |
| docker port | List port mappings or a specific mapping for the container |
| docker ps | List containers |
| docker pull | Pull an image or a repository from a registry |
| docker push | Push an image or a repository to a registry |
| docker rename | Rename a container |
| docker restart | Restart one or more containers |
| docker rm | Remove one or more containers |
| docker rmi | Remove one or more images |
| docker run | Run a command in a new container |
| docker save | Save one or more images to a tar archive (streamed to STDOUT by default) |
| docker search | Search the Docker Hub for images |
| docker secret | Manage Docker secrets |
| docker service | Manage services |
| docker stack | Manage Docker stacks |
| docker start | Start one or more stopped containers |
| docker stats | Display a live stream of container(s) resource usage statistics |
| docker stop | Stop one or more running containers |
| docker swarm | Manage Swarm |
| docker system | Manage Docker |
| docker tag | Create a tag TARGET_IMAGE that refers to SOURCE_IMAGE |
| docker top | Display the running processes of a container |
| docker trust | Manage trust on Docker images |
| docker unpause | Unpause all processes within one or more containers |
| docker update | Update configuration of one or more containers |
| docker version | Show the Docker version information |
| docker volume | Manage volumes |
| docker wait | Block until one or more containers stop, then print their exit codes |