VSYS(8)

📦 version 1.8.16.1, in nixos 26.05, nixpkgs unstable

💅 VSYS(8) — like, the AFS Command Reference one, bestie

okay so real talk: this is vsys from section 8 of the AFS Command Reference, and she is not like other girls — she's a low-level dev tool and she knows it. 🎀

✨ NAME ✨

vsys — make AFS system calls straight from the command line, no cap 🫶

🌸 SYNOPSIS 🌸

vsys <call number> <parms>+

🦋 DESCRIPTION 🦋

so vsys is a development tool that lets you make AFS system calls right from the command line. iconic behavior honestly.

here's the vibe:

  • <call number> — this is the AFS system call you wanna invoke 🔥
  • <parms>+ — these are the values you're passing to that system call ✨

and like… bestie, i'm gonna be so fr with you: you gotta know the AFS system call layer to know which call numbers and parameters are even valid. there's no autocomplete for this one, you just have to know. iykyk 💀

⚠️ CAUTIONS ⚠️

okay listen. this is the part where i hold your hand. 🫶

vsys is meant for debugging AFS at a low level, which means it's for AFS developers. that's it. that's the audience. System Administrators and regular AFS users should use the higher-level interfaces instead — those would be the ones from fs(1), aklog(1), klog(1), and pagsh(1). use those. please. 🙏

also, important: vsys literally provides a way to pass arbitrary data into the AFS system call mechanism. arbitrary. data. 😭 so like, be careful about using this binary or even just providing it on a system — because incorrect use as a privileged user could cause a system to panic, hang, or perform an unsafe operation. that's the trifecta of bad. not cute. not slay. 💀

fr fr, do not mess around with this one as root unless you 100% know what you're doing.

👑 PRIVILEGE REQUIRED 👑

the issuer must be logged in as the local superuser root. that's the whole requirement. main character energy only. ⭐

🌈 SEE ALSO 🌈

Copyright 2009 Steven Jenkins <steven@endpoint.com>

This documentation is covered by the BSD License as written in the doc/LICENSE file. This man page was written by Steven Jenkins for OpenAFS. 🎀

aaaand that's the whole page, bestie 💜 — brought to you by OpenAFS, dated 2026-06-25, filed under VSYS(8). go forth and make your system calls responsibly, mwah 💅✨

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