📢 Essential Docker Commands – Mastering the Basics

 

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Essential Docker Commands – Mastering the Basics

Mastering Docker commands is essential for efficiently managing containers, images, networks, and volumes. These commands help you interact with Docker and streamline the containerization process.

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🔹 Basic Docker Commands

1️⃣ Check Docker Version

docker --version

Displays the installed Docker version.

2️⃣ Pull an Image from Docker Hub

docker pull nginx

Downloads an image from the Docker Hub registry.

3️⃣ Run a Container

docker run -d -p 8080:80 nginx

Runs an Nginx container in detached mode (-d) and maps port 8080 on the host to port 80 inside the container.

4️⃣ List Running Containers

docker ps

Shows active containers. Add -a to see all containers (including stopped ones).

5️⃣ Stop a Running Container

docker stop <container_id>

Stops a container gracefully.

6️⃣ Restart a Container

docker restart <container_id>

Restarts a stopped or running container.

7️⃣ Remove a Container

docker rm <container_id>

Deletes a stopped container permanently.

8️⃣ Remove All Stopped Containers

docker container prune

Deletes all stopped containers at once.

9️⃣ Remove an Image

docker rmi <image_name>

Removes an unused image from the system.

10️⃣ List All Docker Images

docker images

Shows all downloaded Docker images.

11️⃣ Check Container Logs

docker logs <container_id>

Displays logs from a running container.

12️⃣ View Running Processes Inside a Container

docker top <container_id>

Shows processes running inside a container.

13️⃣ Execute a Command Inside a Running Container

docker exec -it <container_id> bash

Opens an interactive shell inside a running container.

14️⃣ Copy Files from a Running Container to Host

docker cp <container_id>:/path/to/file /destination/path

Copies files from a container to the host system.

15️⃣ Inspect Detailed Information About a Container

docker inspect <container_id>

Displays low-level information about a container or image.

16️⃣ Check Disk Usage by Docker Objects

docker system df

Shows disk usage of images, containers, and volumes.

17️⃣ Remove Unused Images, Containers, and Networks

docker system prune -a

Cleans up all unused Docker objects, including dangling images.

📢 Next Up: Writing Dockerfiles – Building Custom Images