4.3BSD - /usr/man/cat8/umount.0

MOUNT(8)                                                              MOUNT(8)


NAME
       mount, umount - mount and dismount file system

SYNOPSIS
       /etc/mount [ special name [ -r ] ]

       /etc/mount -a

       /etc/umount special

       /etc/umount -a

DESCRIPTION
       Mount  announces  to the system that a removable file system is present
       on the device special.  The file name must exist already; it must be  a
       directory  (unless  the root of the mounted file system is not a direc‐
       tory).  It becomes the name of the newly mounted  root.   The  optional
       argument  -r indicates that the file system is to be mounted read-only.

       Umount announces to the system that the removable  file  system  previ‐
       ously mounted on device special is to be removed.

       If the -a option is present for either mount or umount, all of the file
       systems  described  in  /etc/fstab  are  attempted  to  be  mounted  or
       unmounted.   In  this case, special and name are taken from /etc/fstab.
       The special file name from /etc/fstab is the block special name.

       These commands maintain a table of mounted devices  in  /etc/mtab.   If
       invoked without an argument, mount prints the table.

       Physically  write-protected  and  magnetic  tape  file  systems must be
       mounted read-only or errors will occur when access times  are  updated,
       whether or not any explicit write is attempted.

FILES
       /etc/mtab mount table
       /etc/fstab     file system table

SEE ALSO
       mount(2), mtab(5), fstab(5)

BUGS
       Mounting file systems full of garbage will crash the system.
       Mounting a root directory on a non-directory makes some apparently good
       pathnames invalid.


4th Berkeley Distribution       April 27, 1985                        MOUNT(8)