Public access unix systems are part of a tradition more than sixty years old: strangers sharing a single computer and building community on it. Adapted from the tilde repo wiki.
CTSS, the first timesharing system (1961), was built to share an expensive machine efficiently, but users immediately used it to socialize: by 1965 it had WHO and MAIL. The finger command appeared on a DEC-10 in 1971 and reached unix in 1980; the first bulletin board program ran on PLATO in 1973. That same year, Community Memory put a public terminal in a Berkeley record store: arguably the first publicly accessible computerized bulletin board.
Unix itself (1969) was designed for collaborative work, which is why even early systems shipped with who, write, and talk. None of these tools ever went away; they went quiet.
In the early 1980s, home computers and modems made remote socializing available to anyone with a phone line. Most systems ran BBS software, but a few hobbyists opened entire unix machines to the public. A 1987 “nixpub” list on Usenet counted 35 sites, and passed 100 by 1990. Notable systems of the era:
world.std.com, 1989): often credited as the first commercial dial-up ISP, built on shell accesskiller.dallas.tx.us, the pubnix that inspired its founders, was shut down in the 1990 Operation Sundevil raids, SDF became a public access unix itself. It has run continuously since, the oldest pubnix still running. See SDF.
The mid-90s web adopted the tilde idiom for itself: isp.net/~user was the first personal web, where ~ meant “here is a person” long before @ did. Cheap hosting, GeoCities, blogging platforms, and then social media replaced shell accounts for most people. The old pubnixes kept running anyway, collecting decades of homepages and in-jokes.
In October 2014, writer Paul Ford registered tilde.club, tweeted that he would give anyone a shell account, and woke up to hundreds of requests. His essay "I had a couple drinks and woke up with 1,000 nerds" spread the idea; the waitlist reached five figures.
Days later, on October 11, 2014, ~vilmibm opened tilde.town for everyone locked out of club, with deliberately different goals: welcoming to the less technical, no user cap, community first and technology second. Town's founder published a puppet module so anyone could start a tilde, and they did: the tildeverse now spans dozens of servers.
The revival also brought old protocols back into daily use: gopher never left, finger came back for fun, and in 2019 Solderpunk launched gemini, a new protocol deliberately smaller than the web.
| Server | Era |
|---|---|
| sdf | The ancestor: a pubnix since 1987 |
| club | The origin of the 2014 revival |
| town | The community-first approach: intentional, tool-rich |
| pink | The smol web: gemini/gopher-first publishing |
| cosmic | The themed pubnix: accounts exist to write a shared sci-fi story |
| envs | The popular all-rounder: minimal ethos, long service list |
| green | The newest wave: a 2022 tilde still finding its shape |
| rwrs | The DIY fringe: an open-source tilde anyone can clone |