Docker Engine 26.x officially supports Ubuntu 24.04 (Noble). Install via the Docker apt repository: `curl -fsSL https://download.docker.com/linux/ubuntu/gpg | sudo gpg --dearmor -o /etc/apt/keyrings/docker.gpg`, then follow the official Docker docs. Docker 26 includes Docker Compose v2 as a built-in plugin (`docker compose` without hyphen).