mount_lofs(1M) mount_lofs(1M)
NAME [Toc] [Back]
mount_lofs: mount, umount - mount and unmount LOFS file systems
SYNOPSIS [Toc] [Back]
/usr/sbin/mount [-p|-v]
/usr/sbin/mount -a [-F lofs] [-eQ]
/usr/sbin/mount [-F lofs] [-eQrV] [-o specific_options]
{special_directory|directory}
/usr/sbin/mount [-F lofs] [-eQrV] [-o specific_options]
special_directory directory
/usr/sbin/umount [-v] [-V] {special_directory|directory}
/usr/sbin/umount -a [-F lofs] [-v]
DESCRIPTION [Toc] [Back]
The mount command mounts LOFS file systems. Only superuser can mount
LOFS file systems. Other users can use mount to list mounted file
systems.
mount, attaches special_directory, a directory from one of the mounted
file systems, to directory, an another directory in one of the mounted
file systems. This enables new file systems to be created, which
provide access to existing directories or file systems using alternate
path names. Both special_directory and directory should already
exist. directory will become the root of the newly mounted LOFS file
system, containing the file system hierarchy under special_directory.
special_directory and directory must be specified as absolute path
names. If either special_directory 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 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) [Toc] [Back]
mount 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 -F lofs is
specified, all LOFS file systems in /etc/fstab are
mounted. If noauto is specified in an entry's
option list, this entry is skipped. File systems
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mount_lofs(1M) mount_lofs(1M)
are not necessarily mounted in the order listed in
/etc/fstab.
-e Verbose mode. Write a message to standard output
indicating which file system is being mounted.
-F lofs Specify the LOFS file system type (see fstyp(1M)).
-l Limit actions to local file systems only. LOFS is
a local file system.
-o specific_options
Specify options specific to the LOFS file system
type. specific_options is a list of comma
separated suboptions and/or keyword/attribute
pairs intended for the LOFS specific module of the
command.
The following specific_options are valid on an
LOFS file system:
defaults Use all default options. When
used, this must be the only option
specified.
ro Read-only (see WARNINGS below).
-p Report the list of mounted file systems in the
/etc/fstab format.
-Q Prevent display of error messages resulting from
an attempt to mount already mounted file systems.
-r Mount the specified file system as read-only (see
WARNINGS below).
-v Report the output in a new style. The new style
has the file system type and flags displayed in
addition to the old output. The directory and
special_directory 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) [Toc] [Back]
The umount command recognizes the following options:
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mount_lofs(1M) mount_lofs(1M)
-a Attempt to unmount all file systems described in
/etc/mnttab. All optional fields in /etc/mnttab
must be included and supported. If -F lofs file
system type is specified, all the LOFS file
systems in /etc/mnttab are unmounted. File
systems are not necessarily unmounted in the order
listed in /etc/mnttab.
-F lofs Specify the LOFS file system type (see fstyp(1M)).
-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 [Toc] [Back]
Mount an LOFS file system:
mount /usr /tmp/usr
Mount another LOFS file system:
mount -F lofs /usr/sbin /tmp/sbin
WARNINGS [Toc] [Back]
LOFS file systems provide the user with numerous applications;
however, they may be potentially confusing. LOFS file systems should
generally be created by an experienced user.
For LOFS file systems which are mounted read-only, if the underlying
file system is mounted writable, certain write operations on the LOFS
will succeed. Thus LOFS should not be relied upon to provide a
strictly write-only alternative image of a read-write file system.
AUTHOR [Toc] [Back]
mount was developed by HP, AT&T, the University of California,
Berkeley, and Sun Microsystems.
FILES [Toc] [Back]
/etc/fstab Static information about the file systems
/etc/mnttab Mounted file system table
SEE ALSO [Toc] [Back]
mount(1M), mount(2), fstab(4), mnttab(4).
STANDARDS CONFORMANCE [Toc] [Back]
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mount_lofs(1M) mount_lofs(1M)
mount: SVID3
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