Docker

Docker is a developer tool to containerize applications.

Common commands

Look at currently running containers:

docker ps

Look at built images:

docker image ls

Build an image:

docker build -t <container-name> [--file <file-name>].

• If the Dockerfile is not named Dockerfile a custom name can be specified using the -f or --file flag.

Run image:

docker run -p 8080:80 <container-name>

• The -p or --port flag tells Docker to forward public port 8080 to the internal port 80.
• Optionally a -d (detached) flag can be added to let Docker run the container detached.

Look inside current running container:

docker exec -it <container-id> sh 

• <container-id> can be found by executing docker ps.
• The -i flag stands for ‘interactive’ and allows for mouse input
• The -t flag stands for ‘terminal’ and allows for terminal in-/output