This blog post provides a detailed guide to understanding and using basic Docker commands. These commands are essential for managing containers and images effectively.
docker run
The docker run command creates and starts a new container from a specified image. It's the most fundamental command in Docker.
docker run [OPTIONS] IMAGE [COMMAND] [ARG...]
Here's a breakdown:
OPTIONS: Various options can be used to configure the container, such as port mappings (-p), volume mounts (-v), and interactive mode (-it).
IMAGE: The name of the image to use for creating the container.
COMMAND: The command to execute inside the container. If not specified, the image's default command is used.
ARG...: Arguments to pass to the command.
Example:
docker run -d -p 80:80 nginx
This command runs an Nginx web server in detached mode (-d), mapping port 80 on the host to port 80 in the container.
docker ps
The docker ps command lists running containers. Use the -a flag to show all containers, including stopped ones.
docker ps [OPTIONS]
Example:
docker ps -a
docker stop
The docker stop command stops a running container gracefully by sending a SIGTERM signal.
docker stop CONTAINER_ID
Example:
docker stop a1b2c3d4e5f6
docker rm
The docker rm command removes a stopped container.
docker rm CONTAINER_ID
Example:
docker rm a1b2c3d4e5f6
docker images
The docker images command lists locally stored images.
docker images [OPTIONS]
Example:
docker images
docker logs
The docker logs command fetches the logs of a container.
docker logs [OPTIONS] CONTAINER_ID
Example:
docker logs a1b2c3d4e5f6
These basic Docker commands are crucial for building, running, and managing containers. Understanding their usage is a cornerstone of efficient Docker workflows. This blog post has provided a detailed look at each command, equipping you with the knowledge to manage your containers effectively. Explore the Docker documentation for more advanced usage and options.
