genfstab: update page (#16407)

Author: acuteenvy

pages/linux/genfstab.md

@@ -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}}`
+
+- 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`