MAN page from Old RedHat 6.X mount-2.9u-4.i386.rpm
UMOUNT
Section: Linux Programmer's Manual (8)
Updated: 26 July 1997
Index NAME
umount - unmount file systems
SYNOPSIS
umount [-hV]umount -a [-nrv] [-t vfstype]
umount [-nrv] device | dir [...]
DESCRIPTION
The
umountcommand detaches the file system(s) mentioned from the file hierarchy.A file system is specified either by giving the directory where ithas been mounted, or by giving the special device on which it lives.
Note that a file system cannot be unmounted when it is `busy' -for example, when there are open files on it, or when some processhas its working directory there, or when a swap file on it is in use.The offending process could even beumountitself - it opens libc, and libc in its turn may open for examplelocale files.
Options for theumountcommand:
- -V
- Print version and exit.
- -h
- Print help message and exit.
- -v
- Verbose mode.
- -n
- Unmount without writing in/etc/mtab.
- -r
- In case unmounting fails, try to remount read-only.
- -a
- All of the file systems described in/etc/mtabare unmounted. (Withumountversion 2.7 and later: theprocfilesystem is not unmounted.)
- -t vfstype
- Indicate that the actions should only be taken on file systems of thespecified type. More than one type may be specified in a comma separatedlist. The list of file system types can be prefixed withnoto specify the file system types on which no action should be taken.
- -f
- Force unmount (in case of an unreachable NFS system).(Requires kernel 2.1.116 or later.)
THE LOOP DEVICE
The
umountcommand will free the loop device (if any) associatedwith the mount, in case it finds the option `loop=...' in
/etc/mtab.Any pending loop devices can be freed using `losetup -d', see
losetup(8).
FILES
/etc/mtabtable of mounted file systems
SEE ALSO
umount(2),
mount(8),
losetup(8).
HISTORY
A
umountcommand appeared in Version 6 AT&T UNIX.
Index
- NAME
- SYNOPSIS
- DESCRIPTION
- THE LOOP DEVICE
- FILES
- SEE ALSO
- HISTORY
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