Docker Cheat Sheet
Commonly used commands in Docker.
Table of Contents
Image #
Build Commands #
# Build an image.
docker build -t <image-name>
# Build an Image without using cache.
docker build -t <image-name> . –no-cache
# Create a docker image from a running container.
docker commit <container-name-or-id> <image-name>
Cleanup Commands #
# List images.
docker image ls
# Delete the image.
docker rmi <image-name>
# Remove dangling images.
docker image prune
# Remove dangling & used images.
docker image prune -a
# Remove dangling images. (legacy)
docker images -qf dangling=true | xargs -r docker rmi
Docker Registry #
# Log in to Docker Registry
docker login --username <user>
# Pull a version of an image from a registry
docker pull <image>:<tag>
# Tag an image to a repo
docker tag <image> <user>/<repo>
# Search for an image with docker search "{image-search-text}
"docker search "py"
# Push docker image to docker registry.
# Image name has to be in the form of <docker-registry-address>/<docker-repo>[:<docker-tag>].
# Examples are:
# * docker-repo.local/my-image
# * docker-repo.local/my-image:debug
docker push <image-name>
Container #
Interaction Commands #
# Run (create & start) a named container from the image.
docker run --name <container-name> <image-name>
# Run a container in the background.
docker run -d <image-name>
# Run a container with a port mapping.
docker run -p <host-port>:<container-port> <image-name>
# Run a container in interactive mode.
docker run -it <image-name>
# Run a new command inside an already running container.
docker exec [OPTION] <container-name> <command> [ARGs]
# Stop a container.
docker stop <container-id-or-name>
# Gracefully stop all currently running containers.
# -q is a flag that only list out container IDs.
docker stop $(docker ps -q)
Run Command Arguments #
-detach,-d在背景中執行並運轉容器。-i讓容器開啟STDIN管道，在虛擬終端機中輸入指令時，可以從 Host 傳入到 Container 之中，並有即時且持續的互動。-t會建立一個虛擬終端機(pseudo-TTY)讓你可以模擬在容器中使用終端機的環境。--publish,-p開啟容器的 Ports 映射到 Host。--env,-e設定環境變數。--name為容器命名。--network將容器加入特定 Docker 網路群組。--rm容器將在指令執行結束後自動停止並刪除。
深入剖析 docker run 與 docker exec 的 -i 與 -t 技術細節
深入了解執行 Docker 容器時，使用的 `-it` 參數以及使用情境
File Copy #
# Copy files from host to container.
docker cp <host-filepath> <container-id-or-name>:<container-filepath>
# Copy files from container to host.
docker cp <container-id-or-name>:<container-filepath> <host-filepath>
# Export all files in container to host.
docker export <container-id-or-name> -o <filename>
Inspection Commands #
# List running containers.
docker ps
# List all containers.
docker ps -a
# List out container applied filter '{key}={value}'
docker ps -f 'name=<some-key-words>'
# Follow the logs of a container.
docker logs -f <container-id-or-name>
# Inspect a running container.
docker inspect <container-id-or-name>
Cleanup commands #
# Remove a stopped container.
docker rm <container-id-or-name>
# Remove a running container (kill & rm).
docker rm -f <container-id-or-name>
# Delete all non-running containers
docker container prune
# Or clean up all the unused images, containers, networks
docker system prune
# Kill a container.
docker kill <container-id-or-name>