🐳 Docker Command Cheat Sheet

🔢 Basic Docker Commands

1 .docker --version

Use Case: Verify Docker installation and version.
Example:

docker --version

Output:

Docker version 24.0.5, build ced0996

2. docker info

Use Case: Display system-wide information about Docker installation.
Example:

docker info

Output:

Containers: 3
Running: 1
Paused: 0
Stopped: 2
Images: 10
…

3. docker help

Use Case: List available Docker commands and options.
Example:

docker help

Output:

Usage: docker [OPTIONS] COMMAND
…

🚀 Container Management

1. docker ps

Use Case: List running containers.
Example:

docker ps

Output:

CONTAINER ID IMAGE COMMAND STATUS NAMES
abc123 nginx … Up 5s mynginx

2.docker ps -a

Use Case: List all containers, including stopped ones.
Example:

docker ps - a

Output:

CONTAINER ID IMAGE COMMAND STATUS NAMES
abc123 nginx … Exited (0) 2 minutes ago mynginx

3. docker stop < container_id >

Use Case: Stop a running container.
Example:

docker stop abc123

Output:

abc123

4. docker start < container_id >

Use Case: Start a previously stopped container.
Example:

docker start abc123

Output:

abc123

5. docker restart < container_id >

Use Case: Restart a container (stop and start).
Example:

docker restart abc123

Output:

abc123

6. docker rm < container_id >

Use Case: Remove a stopped container from the system.
Example:

docker rm abc123

Output:

abc123

7. docker logs < container_id >

Use Case: View logs for a container.
Example:

docker logs abc123

Output:

Starting nginx...

Ready to serve requests

8. docker exec -it < container_id > bash

Use Case: Access the shell of a running container.
Example:

docker exec -it abc123 bash

Output:

root@abc123:/#

🌀 Image Management

1. docker images

Use Case: List all Docker images available locally.
Example:

docker images

Output:

REPOSITORY TAG IMAGE ID CREATED SIZE
nginx latest abcdef123456 3 days ago 133MB

2. docker pull < image_name >

Use Case: Download an image from Docker Hub.
Example:

docker pull nginx

Output:

Using default tag: latest
latest: Pulling from library/nginx
…
Digest: sha256:…
Status: Downloaded newer image for nginx:latest

3. docker rmi < image_name >

Use Case: Remove a local Docker image.
Example:

docker rmi nginx

Output:

Untagged: nginx:latest
Deleted: sha256:…

4. docker build - t < image_name > .

Use Case: Build a Docker image from a Dockerfile.
Example:

docker build -t myapp .

Output:

Successfully built abcdef123456
Successfully tagged myapp:latest

🛠️ Running Containers

1. docker run < image_name >

Use Case: Run a container from an image.
Example:

docker run nginx

Output:

... (nginx process logs)

2. docker run -d < image_name >

Use Case: Run a container in the background (detached mode ).
Example:

docker run -d nginx

Output:

abc123456789...

3. docker run --name < name > < image >

Use Case: Assign a name to the container
Example:

docker run --name mynginx nginx

Output:

... (container output)

4. docker run -p 8080:80 < image >

Use Case: Expose a container port to the host.
Example:

docker run -p 8080:80 nginx

Output:

... (nginx running and accessible at localhost:8080)

5. docker run -v /host/path:/container/path < image >

Use Case: Mount host directory into the container.
Example:

docker run -v /tmp:/data nginx

Output:

... (container starts and has access to /data)

6. docker run --rm < image >

Use Case: Automatically remove the container once it stops.
Example:

docker run --rm hello-world

Output:

Hello from Docker!

...

🌐 Networking

1. docker network ls

Use Case: List all Docker networks.
Example:

docker network ls

Output:

NETWORK ID NAME DRIVER SCOPE
abc123 bridge bridge local

. . .

2.docker network create < network_name >

Use Case: Create a new custom network.
Example:

docker network create mynet

Output:

mynet

3. docker network inspect < network_name >

Use Case: Inspect detailed information about a network.
Example:

docker network inspect mynet

Output:

[
{
“Name”: “mynet”,
“Id”: “…”,
“Containers”: {},
…
}
]

4. docker network connect < network_name > < container_name >

Use Case: Connect a container to a network.
Example:

docker network connect mynet mynginx

Output:

(no output if successful)

5. docker network disconnect <network_name> <container_name>

Use Case: Disconnect a container from a network.
Example:

docker network disconnect mynet mynginx

Output:

(no output if successful)

📁 Volumes & Storage

1. docker volume ls

Use Case: List all docker volumes
Example:

docker volume ls

Output:

DRIVER VOLUME NAME
local myvolume

2. docker volume create < volume_name >

Use Case: Create a new volume
Example:

docker volume create myvolume

Output:

myvolume

3. docker volume inspect < volume_name >

Use Case: View detailed info about a volume.
Example:

docker volume inspect myvolume

Output:

[
{
“Name”: “myvolume”,
“Driver”: “local”,
…
}
]

4. docker volume rm < volume_name >

Use Case: Delete a Volume
Example:

docker volume rm myvolume

Output:

myvolume

📄 Docker Compose

1. docker-compose up

Use Case: Start services defined in a docker-compose.yml.
Example:

docker-compose up

Output:

Starting myapp … done
…

2. docker-compose up -d

Use Case:Start services in detached mode.
Example:

docker-compose up -d

Output:

Creating network “myapp_default” with the default driver
Creating myapp … done

3. docker-compose down

Use Case: Stop and remove all services and resources created by Compose.
Example:

docker-compose down

Output:

Stopping myapp … done
Removing myapp … done
Removing network myapp_default

🏰 Docker System Cleanup

1. docker system prune

Use Case: Remove all unused data (containers, networks, images).
Example:

docker system prune

Output:

Deleted Containers:
…
Total reclaimed space: 200MB

2. docker image prune

Use Case: Remove unused images.
Example:

docker image prune

Output:

Deleted Images:
…
Total reclaimed space: 150MB

3. docker container prune

Use Case: Remove stopped containers.
Example:

docker container prune

Output:

Deleted Containers:
…
Total reclaimed space: 50MB

🛠️ Docker Registry & Hub

1. docker login

Use Case: Authenticate with Docker Hub or a private registry.
Example:

docker login

Output:

2. docker logout

Use Case: Logout from the Docker registry.
Example:

docker logout

Output:

Removing login credentials for https://index.docker.io/v1/

3. docker tag < image_name > < registry >/< repo >:< tag >

Use Case: Tag an image before pushing to a registry.
Example:

docker tag myapp myregistry/myapp:latest

Output:

(no output if successful)

4. docker push < registry >/< repo >:< tag >

Use Case: Upload an image to a registry.
Example:

docker push myregistry/myapp:latest

Output:

The push refers to repository [myregistry/myapp]
…
latest: pushed

5. docker pull < registry >/< repo >:< tag >

Use Case: Download an image from a registry.
Example:

docker pull myregistry/myapp:latest

Output:

latest: Pulling from myapp
…
Digest: sha256:…
Status: Downloaded newer image

6. docker search < image_name >

Use Case: Search for images on Docker Hub.
Example:

docker search nginx

Output:

NAME DESCRIPTION STARS OFFICIAL AUTOMATED
nginx Official build of 15000+ [OK]

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