The mount -a command disregards mount options, which makes it useless when that's what you changed.

How to re-evaluate all the mount options in fstab as if rebooting?

2 Answers 2


Have you tried the remount option?

mount -o remount -a

Should re-mount with the changed mount-options of your fstab.


The manual way, as a fish multiliner:

cat /etc/fstab | while read dev mnt type opt dump pass
    if not string match noauto (string split , $opt)
        mount -o remount,$opt $mnt

This assumes that the noauto mountpoints are not mounted. Which is the case for me, as my backup disks are normally unmounted.

  • 2
    it also assumes there are no comments in your fstab file or spaces in your mount point.
    – L.Ray
    Apr 5, 2020 at 0:13

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