ReaderFunded · site

SDF Public Access UNIX System

sdf.org

SDF Public Access UNIX System, “SDF Public Access UNIX System”, is a tech site on sdf.org, in English, funded by its readers: about 12 paying supporters on Ko-fi, estimated.

A free community UNIX shell server, est. 1987, offering shell accounts, email, IRC, gopher, and user home pages.

Visit SDF Public Access UNIX SystemSupport on Ko-fiSubscribe on Substack

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Pages

90 pages indexed; the pages that lead the site by its internal links:

Standing

Verified funding

• irs990 https://projects.propublica.org/nonprofits/organizations/800016172verified 2026-08-23
• kofi https://ko-fi.com/l4l614qncverified 2026-08-18
• substack https://sdf.org/subscribeverified 2026-11-03

Badge

For the site's owner: a badge that says readers fund it, linked to this page. It shows the live figure, so it never goes stale; a count appears once a platform publishes one.

HTML

<a href="https://readerfunded.com/site/sdf.org"><img src="https://readerfunded.com/badge/sdf.org.svg" alt="Reader-funded, verified by ReaderFunded" height="20"></a>

Markdown

[![Reader-funded, verified by ReaderFunded](https://readerfunded.com/badge/sdf.org.svg)](https://readerfunded.com/site/sdf.org)

Neighbourhood

Linked from 1,811 domains, links to 11,167; of the latter, the funded sites are shown. Funded sites first, then the sources that link to fewest other funded sites. Links as seen in the Common Crawl domain graph (cc-main-2026-aug-sep-oct), cut 2026-10-23: the pages crawled in a window of three months, not necessarily the site of today, and a page not crawled in that window leaves no link.

Similar funded sites

Sites the same sources link to, by cosine over the sets of linking domains. More.