Essential Docker Commands Every Developer Should Master

Docker is an open‑source platform that packages, distributes, and runs applications in lightweight containers, independent of language, framework, or packaging system, making it suitable for everything from personal computers to high‑end servers.

1. Pull Docker Images

Before pulling an image, add 127.0.0.1 index.docker.io to /etc/hosts to mitigate potential pull‑related risks. # nano /etc/hosts Add the following line and save the file: 127.0.0.1 index.docker.io Then pull the desired image, for example: # docker pull registry.hub.docker.com/busybox Check locally available images:

# docker images

2. Run Docker Containers

Start a container interactively: # docker run -it busybox Exit the interactive shell with Ctrl‑D . To run a container in the background, use the -d flag: # docker run -itd busybox Attach to a running container using its ID (obtainable via docker ps):

# docker attach <container id>

3. Check Container Status

List running containers: # docker ps List all containers, including stopped ones:

# docker ps -a

4. Inspect Container Information

View detailed information about a container:

# docker inspect <container id>

5. Stop or Remove Containers and Images

Stop a container: # docker stop <container id> Stop all running containers: # docker kill $(docker ps -q) Remove a specific container: # docker rm <container id> Remove all containers: # docker rm $(docker ps -aq) These fundamental commands make Docker easy to use and provide a simple computing platform for end users.