Install Docker Engine on Debian

1. Create a bash script

sudo nano dockerinstal.sh

2. Paste this code, save and close

# Set up Docker's apt repository
# Add Docker's official GPG key:
sudo apt-get update
sudo apt-get install ca-certificates curl -y
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

# Add the repository to Apt sources:
echo \
  "deb [arch=$(dpkg --print-architecture) signed-by=/etc/apt/keyrings/docker.asc] https://download.docker.com/linux/debian \
  $(. /etc/os-release && echo "$VERSION_CODENAME") stable" | \
  sudo tee /etc/apt/sources.list.d/docker.list > /dev/null

sudo apt-get update

# Install the Docker packages
sudo apt-get install docker-ce docker-ce-cli containerd.io docker-buildx-plugin docker-compose-plugin -y

# Manage Docker as a non-root user
sudo groupadd docker
sudo usermod -aG docker $USER
newgrp docker

3. Make it executable

sudo chmod +x dockerinstal.sh

4. Run it

./dockerinstal.sh

5. Wait for it to end

6. Check it is working by running

docker ps