Docker 是一個開源項(xiàng)目，能夠快速地構(gòu)建、測試、發(fā)布分布式應(yīng)用程序。Docker 對象是打包軟件的輕量級獨(dú)立可執(zhí)行包，通過 Docker 可以將應(yīng)用程序的依賴項(xiàng)打包到一起，使應(yīng)用程序在不同的環(huán)境中運(yùn)行的更可靠。

在 Docker 中，使用docker命令來管理容器、鏡像等，其中docker h命令幫助我們查看其它命令的詳細(xì)信息。下面我們來一一了解一下其中的參數(shù)：

$ docker h [OPTIONS] COMMAND

OPTIONS：

--help                    幫助信息
--verbose, -v             顯示命令的詳細(xì)信息

COMMAND：

attach       Attach to a running container
build        Build an image from a Dockerfile
commit       Create a new image from a container's changes
cp           Copy files/folders between a container and the local filesystem
create       Create a new container
diff         Inspect changes on a container's filesystem
events       Get real time events from the server
exec         Run a command in a running container
export       Export a container's filesystem as a tar archive
history      Show the history of an image
images       List images
import       Import the contents from a tarball to create a filesystem image
info         Display system-wide information
inspect      Return low-level information on a container or image
kill         Kill a running container
load         Load an image from a tar archive or STDIN
login        Log in to a Docker registry
logout       Log out from a Docker registry
logs         Fetch the logs of a container
pause        Pause all processes within a container
port         List port mappings or a specific mapping for the container
ps           List containers
pull         Pull an image or a repository from a registry
push         Push an image or a repository to a registry
rename       Rename a container
restart      Restart a container
rm           Remove one or more containers
rmi          Remove one or more images
run          Run a command in a new container
save         Save one or more images to a tar archive (streamed to STDOUT by default)
search       Search the Docker Hub for images
start        Start one or more stopped containers
stats        Display a live stream of container(s) resource usage statistics
stop         Stop a running container
tag          Create a tag TARGET_IMAGE that refers to SOURCE_IMAGE
top          Display the running processes of a container
unpause      Unpause all processes within a container
update       Update configuration of one or more containers
version      Show the Docker version information
wait         Block until a container stops, then print its exit code

通過運(yùn)行docker h XXX命令，我們可以來了解某一個命令的詳細(xì)信息，例如：docker h run命令可以查看如何使用docker run命令。

總結(jié)：

docker h命令可以幫助我們了解 Docker 的命令集，它是一個方便使用的命令行接口，旨在幫助使用者更加方便的使用 Docker。