systemd-nspawn: the container tool that's like chroot on steroids

A whirlwind tour of systemd-nspawn containers

A practical walkthrough of systemd-nspawn, the lightweight namespace-based container technology. It explains when to use it over Docker—especially for GPU access, VPS isolation, and avoiding virtualization overhead—and shows how to build root filesystems with debootstrap, dnf, and a forked Alpine installer that fixes dangerous defaults. The author also shares real-world tips from running self-hosted LLMs in nspawn containers.