Docker

Installing Docker on Debian 13 (Trixie)
Step 1: Update the Package Index and Install Dependencies 
 sudo apt update
sudo apt install ca-certificates curl 
 Step 2: Import Docker’s Official GPG Key 
 sudo install -m 0755 -d /etc/apt/keyrings
sudo curl -fsSL https://download.docker.com/linux/debian/gpg -o /etc/apt/keyrings/docker.asc
sudo chmod a+r /etc/apt/keyrings/docker.asc 
 Step 3: Add the Docker APT Repository 
 echo \
 "deb [arch=$(dpkg --print-architecture) signed-by=/etc/apt/keyrings/docker.asc] https://download.docker.com/linux/debian trixie stable" | \
 sudo tee /etc/apt/sources.list.d/docker.list 
 Step 4: Install Docker Engine 
 sudo apt update
sudo apt install docker-ce docker-ce-cli containerd.io docker-buildx-plugin docker-compose-plugin 
 Verify the Docker Installation 
 sudo systemctl status docker 
 The output will look something like this: 
 ● docker.service - Docker Application Container Engine
 Loaded: loaded (/usr/lib/systemd/system/docker.service; enabled)
 Active: active (running)
... 
 Run Docker Commands Without sudo 
 By default, only root and users with sudo privileges can run Docker commands. To allow a non-root user to execute Docker commands, add the user to the docker group: 
 sudo usermod -aG docker $USER 
 $USER is an environment variable that holds the currently logged-in username. To add a different user, replace $USER with the username. 
 Run newgrp docker or log out and log back in for the group membership change to take effect. 
 Verifying Docker with a Test Container 
 To verify that Docker is installed correctly and works without sudo , run a test container : 
 docker container run hello-world 
 If the image is not found locally, Docker will download it from Docker Hub, run the container, print a “Hello from Docker” message, and exit. 
 Unable to find image 'hello-world:latest' locally
latest: Pulling from library/hello-world
...
Hello from Docker!
This message shows that your installation appears to be working correctly.
... 
 The container stops after printing the message because it has no long-running process. 
 Conclusion 
 Installing Docker on Debian 13 from the official Docker repository ensures you always have access to the latest stable releases and security updates. Once installed, add your user to the  docker group to run commands without sudo . 
 For advanced configuration, check the official Docker post-install guide .