The non-superuser mounts.
Normally, only the superuser can mount filesystems. However, when fstab
contains the user option on a line, anybody can mount the corresponding sys‐
tem.
Thus, given a line
/dev/cdrom /cd iso9660 ro,user,noauto,unhide
any user can mount the iso9660 filesystem found on his CDROM using the com‐
mand
mount /dev/cdrom
or
mount /cd
For more details, see fstab(5). Only the user that mounted a filesystem can
unmount it again. If any user should be able to unmount, then use users
instead of user in the fstab line. The owner option is similar to the user
option, with the restriction that the user must be the owner of the special
file. This may be useful e.g. for /dev/fd if a login script makes the con‐
sole user owner of this device. The group option is similar, with the
restriction that the user must be member of the group of the special file.
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