Step-by-step: Install Docker on Debian 12
1. Update your system
sudo apt update
sudo apt upgrade -y
2. Install prerequisites
sudo apt install -y \
ca-certificates \
curl \
gnupg \
lsb-release
3. Add Docker’s official GPG key
sudo install -m 0755 -d /etc/apt/keyrings
curl -fsSL https://download.docker.com/linux/debian/gpg | \
sudo gpg --dearmor -o /etc/apt/keyrings/docker.gpg
sudo chmod a+r /etc/apt/keyrings/docker.gpg
4. Set up the Docker repository
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
5. Update package index
sudo apt update
6. Install Docker Engine
sudo apt install -y docker-ce docker-ce-cli containerd.io docker-buildx-plugin docker-compose-plugin