NULLFS(5)

💅 NULLFS(5) — like, the nullfs manual page bestie 💅

okay so this is the nullfs(5) page, aka the File Formats Manual entry for the null file system, and I'm gonna walk you through it like we're texting at 2am 🦋

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✨ NAME ✨

nullfs — the null file system, no cap 💫

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✨ SYNOPSIS ✨

So to enable support for this driver, you literally just place the following line in the kernel configuration file:

options NULLFS

Alternatively (yes there's an alt route, we love options 🎀), to load the driver as a module at boot time, place the following line in loader.conf(5):

nullfs_load="YES"

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✨ DESCRIPTION ✨

The nullfs driver will permit the FreeBSD kernel to mount a loopback file system sub-tree. That's it. That's the whole vibe. 🌀

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✨ EXAMPLES ✨

To mount a nullfs file system, you do:

mount_nullfs /usr/ports /home/devel/ports

Iconic, honestly. 👑

It is also possible to define an entry in fstab(5) that looks similar to:

/usr/ports      /home/devel/ports       nullfs          rw      0       0

Like, go off, fstab bestie 📝✨

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✨ SEE ALSO ✨

• fstab(5)
• mount_nullfs(8)

(the squad 💖)

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✨ HISTORY ✨

The nullfs layer first appeared in 4.4BSD. a whole legend, fr fr 🫶

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✨ AUTHORS ✨

The nullfs kernel implementation was written by John Heideman.

This manual page was written by Daniel Gerzo <danger@FreeBSD.org>.

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💀 reminder bestie: every flag, path, and line above is copy-pasted exactly — don't go tweaking the code blocks, they're giving main character energy and they need to stay perfect 🙈

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and that's the whole page!! this version is from Debian, dated March 15, 2022 — mwah, catch you on the next manpage 💜🎀🌈