The closest I can get is with `mount`, so refer to that instead.
# mount none -t proc /proc
mount: /proc: none already mounted or mount point busy.
# umount /proc
umount: /proc: target is busy.
# (cd /root; umount proc)
umount: /proc: target is busy.
Signed-off-by: Alan Jenkins <alan.christopher.jenkins@gmail.com>
can be used instead of a device specification.
(The customary choice
.I none
-is less fortunate: the error message `none busy' from
-.B umount
+is less fortunate: the error message `none already mounted' from
+.B mount
can be confusing.)
.SS The files /etc/fstab, /etc/mtab and /proc/mounts