Docker Installation

Update the package list:

sudo apt-get update

Install the necessary packages:

sudo apt-get install ca-certificates curl gnupg

Create the directory for the repository keys:

sudo install -m 0755 -d /etc/apt/keyrings

Download and add the Docker GPG key:

curl -fsSL https://download.docker.com/linux/debian/gpg | sudo gpg --dearmor -o /etc/apt/keyrings/docker.gpg

Change the permissions of the GPG key:

sudo chmod a+r /etc/apt/keyrings/docker.gpg

Add the Docker repository to the APT sources list:

echo "deb [arch=$(dpkg --print-architecture) signed-by=/etc/apt/keyrings/docker.gpg] https://download.docker.com/linux/debian $(lsb_release -cs) stable" | sudo tee /etc/apt/sources.list.d/docker.list > /dev/null

Update the package list to include the Docker repository:

sudo apt-get update

Install the necessary Docker packages:

sudo apt-get install docker-ce docker-ce-cli containerd.io docker-buildx-plugin docker-compose-plugin

Verify Docker Installation

Check the status of the Docker service:

systemctl status docker

If Docker is “active (running)”, enable the Docker service to start automatically after the machine reboots:

sudo systemctl enable docker

Useful Docker Commands

docker ps -a: Shows all containers, including their status, creation date, age, name, and ID.
docker stop <container_id> / docker rm <container_id>: Stops (stop) and removes (rm) a container by adding its ID.
docker compose up -d: Runs the docker-compose.yml file to start the containers in detached mode (-d).

Command Details

docker ps -a: Displays all containers, whether running or stopped, with information such as:
- Container ID
- Image used
- Command executed
- Creation date
- Status (running, stopped, etc.)
- Exposed ports
- Container names
docker stop <container_id> / docker rm <container_id>:
- docker stop <container_id>: Stops a running container.
- docker rm <container_id>: Removes a stopped container.

Example:

docker stop 1a2b3c4d5e6f
docker rm 1a2b3c4d5e6f