Docker

Docker is a containerization software. Docker containers are more lightweight than virtual machines since the containers run on the host kernel—a Docker container must be running the same OS as its underlying host (in case of Windows, WSL2 or Hyper-V is used). Docker and other containerization technologies are often used to distribute reproducible builds / configurations of software.

• To build an image from a Dockerfile, run docker build . [-t <name>]. To use the image without naming it, run docker build . -q which outputs a SHA256 ID.
• To list images, run docker image ls
• To create a container from an image, run docker run -it <image-name-or-id>
• To list containers, run docker ps -a or docker container ls -a
• To execute a command in a running container, run docker exec -it <container-name-or-id> <command...>

Docker Desktop basic troubleshooting (e.g., container won’t turn on):

• Check if WSL integration turned off when it was turned on before.
• Try quitting Docker Desktop, run wsl --shutdown, and start Docker Desktop again.
• Try restarting your computer.