A whirlwind tour of systemd-nspawn containers

Systemd-nspawn is a lightweight container technology similar to Docker but with key differences: it uses writable root filesystems like virtual machines rather than read-only images, and functions more like an enhanced chroot. The author explains that systemd-nspawn is particularly useful for isolating software on VPS environments, sharing hardware access like GPUs, and avoiding virtualization overhead, and provides guidance on setting up containers using tools like debootstrap for Debian-based systems.