NAME
mount, umount — mount and unmount file systems
SYNOPSIS
/usr/sbin/mount
[-l]
[-p|-v]
/usr/sbin/mount
-a
[-F
FStype]
[-eQ]
/usr/sbin/mount
[-F
FStype]
[-eQrV]
[-o
specific_options]
{special|directory}
/usr/sbin/mount
[-F
FStype]
[-eQrV]
[-o
specific_options]
special
directory
/usr/sbin/umount
[-f]
[-v]
[-V]
{special|directory}
/usr/sbin/umount
-a
[-f]
[-F
FStype]
[-h
host]
[-v]
DESCRIPTION
The
mount
command mounts file systems.
Only
a superuser
can mount file systems.
Other users can use
mount
to list mounted file systems.
The
mount
command attaches
special,
a removable file system, to
directory,
a directory on the file tree.
directory,
which must already exist,
will become the name of the root of the newly mounted file system.
special
and
directory
must be given as absolute path names.
If either
special
or
directory
is omitted,
mount
attempts to determine the missing value from an entry in the
/etc/fstab
file.
mount
can be invoked on any removable file system, except
/.
If
mount
is invoked without any arguments,
it lists all of the mounted file systems from the file system mount table,
/etc/mnttab.
The
umount
command unmounts mounted file systems.
Only
a superuser
can unmount file systems.
Options (mount)
The
mount
command recognizes the following options:
- -a
Attempt to mount all file systems described in
/etc/fstab.
All optional fields in
/etc/fstab
must be included and supported.
If the
-F
option is specified, all file systems in
/etc/fstab
with that
FStype
are mounted. If
noauto
is specified in an entry's option list, this entry is skipped.
File systems are not necessarily mounted in the order listed in
/etc/fstab.
- -e
Verbose mode.
Write a message to the standard output
indicating which file system is being mounted.
- -F FStype
Specify
FStype,
the file system type on which to operate.
See
fstyp(1M).
If this option is not included on the command line,
then it is determined from either
/etc/fstab,
by matching
special
with an entry in that file,
or from file system statistics of
special,
obtained by
statfsdev()
(see
statfsdev(3C)).
- -h
Unmount only those file systems listed in
/etc/mnttab
that are remote-mounted from
host.
- -l
Limit actions to local file systems only.
- -o specific_options
Specify options specific to each file system type.
specific_options
is a list of comma separated suboptions and/or keyword/attribute pairs
intended for a
FStype-specific
version of the command. See the
FStype-specific
manual entries for a description of the
specific_options
supported, if any.
- -p
Report the list of mounted file systems in the
/etc/fstab
format.
- -Q
Prevent the display of error messages
that result from an attempt to mount already mounted file systems.
- -r
Mount the specified file system as read-only.
Physically write-protected file systems must be mounted in this way
or errors occur when access times are updated,
whether or not any explicit write is attempted.
- -v
Report the regular output with file system type and flags;
however, the
directory
and
special
fields are reversed.
- -V
Echo the completed command line,
but perform no other action.
The command line is generated
by incorporating the user-specified options
and other information derived from
/etc/fstab.
This option allows the user to verify the command line.
Options (umount)
The
umount
command recognizes the following options:
- -a
Attempt to unmount all file systems described in
/etc/mnttab.
All optional fields in
/etc/mnttab
must be included and supported.
If
FStype
is specified, all file systems in
/etc/mnttab
with that
FStype
are unmounted.
File systems are not necessarily unmounted in the order listed in
/etc/mnttab.
- -f
Forced unmount.
A forced unmount is one which will occur regardless of
activity on the file system.
Not supported by all file system types.
See file system type specific man pages for more information.
If the file system type man page does not mention forced unmount, then
it is not supported for that file system type.
- -F FStype
Specify
FStype,
the file system type on which to operate.
If this option is not included on the command line,
then it is determined from
/etc/mnttab
by matching
special
with an entry in that file.
If no match is found, the command fails.
- -v
Verbose mode.
Write a message to standard output
indicating which file system is being unmounted.
- -V
Echo the completed command line, but perform no other action.
The command line is generated
by incorporating the user-specified options
and other information derived from
/etc/fstab.
This option allows the user to verify the command line.
EXAMPLES
List the file systems currently mounted:
Mount the HFS file system
/dev/disk/disk0
at directory
/home:
mount -F hfs /dev/disk/disk0 /home
Unmount the same file system:
WARNINGS
If you receive a message that says "Can't send after socket shutdown",
contact your system administrator to make sure the
fsdaemon
is running properly.
AUTHOR
mount
was developed by HP,
AT&T,
the University of California, Berkeley,
and Sun Microsystems.
FILES
- /etc/fstab
Static information about the systems
- /etc/mnttab
Mounted file system table
SEE ALSO
fsadm(1M),
fstadm(1M),
mount_cachefs(1M),
mount_cdfs(1M),
mount_hfs(1M),
mount_lofs(1M),
mount_nfs(1M),
mount_vxfs(1M),
mount(2),
fstab(4),
mnttab(4),
fs_wrapper(5),
quota(5),
disk(7).
STANDARDS CONFORMANCE
mount: SVID3
umount: SVID3
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