oss.zone: A Free Pubnix to Learn Real Servers

You can learn SSH, host a personal site, and use mail, git, and chat without renting your own VPS, thanks to a community-run shared Linux server that hands out free accounts.

What it is

oss.zone is a community-run, non-commercial pubnix, which is short for public Unix. It is a shared NixOS server that anyone can apply to join. Once approved, you add your SSH key, log in, and get a real Linux account on a real machine. It is not a simulated tutorial environment. It is a live, multi-user system where you learn by doing.

Beyond the shell account, oss.zone comes with a collection of self-hosted services. You can host a website at username.oss.zone, run CGI scripts, attach custom domains, or reverse proxy your own app through a Unix socket. The community also provides a git forge, mail server, Matrix, XMPP, collaborative pads, markdown notes, an RSS reader, privacy-friendly frontends for search and Reddit, a federated social space, and even a few small games. It is a dorm for builders, not a cloud product.

Why it matters

• It gives beginners a real shared server to learn SSH, Linux, and NixOS workflows without paying for a VPS.
• It comes with website hosting, mail, chat, git, notes, and RSS instead of making you self-host every piece from scratch.
• The project is unusually transparent about limits, stats, and infrastructure. It publicly lists user counts, websites, memory use, and disk use.
• It fits learning, demos, portfolios, and small personal projects much better than heavy production work.

How it works

You apply for an account on the oss.zone website. Approval is manual, because this is a community system, not instant private infrastructure. Once approved, you add your SSH public key and connect with ssh username@oss.zone. From there, you can serve static files from your public HTML directory, use the provided services, or explore the NixOS environment.

The main server runs on Hetzner in Falkenstein, Germany, with 8 GB of RAM and 80 GB of storage. Each account gets 1 GB of RAM, 5 login sessions, 150 processes, and fair-use storage. The stats page shows real numbers: at the time of checking, 48 total users, 15 websites, and 24 SSH users across 14 countries.

Caveats

The hardware is intentionally modest, so it makes more sense for learning and side projects than serious compute-heavy workloads. Account approval is manual, so you cannot spin up an account instantly. Storage is fair use, not a blank check for backups or large data hoarding. This is a shared system, so you do not have root, and you cannot install system-wide packages or reconfigure the server.

Do not confuse this with a private VPS or object storage product. If you need full root control, heavy compute, or serious production hosting, this is not that.