How to Install Docker on Ubuntu

sudo apt remove docker docker-engine docker.io containerd runc

sudo apt update
sudo apt install ca-certificates curl gnupg
sudo install -m 0755 -d /etc/apt/keyrings
curl -fsSL https://download.docker.com/linux/ubuntu/gpg | \
  sudo gpg --dearmor -o /etc/apt/keyrings/docker.gpg
sudo chmod a+r /etc/apt/keyrings/docker.gpg
 
echo \
  "deb [arch=$(dpkg --print-architecture) signed-by=/etc/apt/keyrings/docker.gpg] \
  https://download.docker.com/linux/ubuntu $(. /etc/os-release && echo "$VERSION_CODENAME") stable" | \
  sudo tee /etc/apt/sources.list.d/docker.list > /dev/null

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

sudo usermod -aG docker $USER
newgrp docker

docker run hello-world
docker compose version

mkdir -p ~/whoami && cd ~/whoami
cat > compose.yaml <<'EOF'
services:
  whoami:
    image: traefik/whoami
    ports:
      - "8088:80"
    restart: unless-stopped
EOF
docker compose up -d