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genfstab: update page #16407

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18 changes: 11 additions & 7 deletions pages/linux/genfstab.md
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Original file line number Diff line number Diff line change
@@ -1,20 +1,24 @@
# genfstab

> Arch Linux install script to generate output suitable for addition to an fstab file.
> More information: <https://manned.org/genfstab.8>.
> Generate output suitable for addition to the `/etc/fstab` file.
> More information: <https://manned.org/genfstab>.

- Display an fstab compatible output based on a volume label:
- Generate the `/etc/fstab` file using volume UUIDs during an Arch Linux installation (requires root permissions):

`genfstab -U {{/mnt}} >> {{/mnt/etc/fstab}}`
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@Managor Managor May 8, 2025 •
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Why does Arch Wiki use append? Shouldn't a single > be better so that /etc/fstab doesn't accumulate cruft?

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@acuteenvy acuteenvy May 8, 2025 •
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Probably because the filesystem package, which is a dependency of base contains /etc/fstab with some comments:
https://gitlab.archlinux.org/archlinux/packaging/packages/filesystem/-/blob/b50d92111d267e8f4dad98aba7ae713ce300f746/fstab

# Static information about the filesystems.
# See fstab(5) for details.

# <file system> <dir> <type> <options> <dump> <pass>

If you use >, you'll overwrite them.


- Display fstab-compatible output based on volume labels:

`genfstab -L {{path/to/mount_point}}`

- Display an fstab compatible output based on a volume UUID:
- Display fstab-compatible output based on volume UUIDs:

`genfstab -U {{path/to/mount_point}}`

- A usual way to generate an fstab file, requires root permissions:
- Display fstab-compatible output based on the specified identifier:

`genfstab -U {{/mnt}} >> {{/mnt/etc/fstab}}`
`genfstab -t {{LABEL|UUID|PARTLABEL|PARTUUID}}`

- Append a volume into an fstab file to mount it automatically:
- Append a volume into the `/etc/fstab` file to mount it automatically:

`genfstab -U {{path/to/mount_point}} | sudo tee -a /etc/fstab`