mount(1M) — ADMINISTRATOR COMMANDS

NAME

mount, umount (generic) − mount or unmount file systems and remote resources

SYNOPSIS

mount [−v |−p]
mount [−F FSType] [−V] [current_options] [−o specific_options] {special | mount_point}
mount [−F FSType] [−V] [current_options] [−o specific_options] special mount_point
umount [−V] [−o specific_options] {special | mount_point}

DESCRIPTION

File systems other than root ( / ) are considered removable in the sense that they can be either available to users or unavailable. mount notifies the system that special, a block special device or a remote resource, is available to users from the mount_point which must already exist; it becomes the name of the root of the newly mounted special or resource.

mount, when entered with arguments, validates all arguments except for the device name and invokes a FSType specific mount module. If invoked with no arguments, mount lists all the mounted file systems from the mount table. If invoked with any of the following partial argument lists, for example, one of special or mount_point or when both arguments are specified but no FSType is specified mount will search /etc/vfstab to fill in the missing arguments: FSType, special, mount_point, and specific_options. It will then invoke the FSType-specific mount module. See mount_FSType(1M) for details.

Most FSTypes do not have a umount specific module. If one exists it is executed otherwise the generic unmounts the file systems. If the -o option is specified the umount specific module is always executed.

current_options are options supported by the s5-specific module of mount and umount. Other FSTypes do not necessarily support these options. specific_options indicate suboptions specified in a comma-separated list of suboptions and/or keyword-attribute pairs for interpretation by the FSType-specific module of the command.

The options are:

−v Print the output in a new style. The new output has the FSType and flags displayed in addition to the old output. The mount_point and special fields are reversed.

−p Print the list of mounted file systems in the /etc/vfstab format.

−F used to specify the FSType on which to operate. The FSType must be specified or must be determinable from /etc/vfstab while mounting a file system.

−V Echo the complete command line, but do not execute the command. The command line is generated by using the options and arguments provided by the user and adding to them information derived from /etc/vfstab. This option should be used to verify and validate the command line.

−o used to specify FSType-specific options.

mount can be used by any user to list mounted file systems and resources. Only a super-user can mount or unmount file systems.

NOTES

The old output format will be phased out in a future release and all output will be in the new −v format. The most significant changes are the addition of two new fields to show the FSType and flags and the reversal of the mount_point and special name.

If a special device in the mount table /etc/mnttab is not found in /etc/vfstab, the -p format will print a “—” as the corresponding fsck device.

mount adds an entry to the mount table /etc/mnttab; umount removes an entry from the table. Entries made before the system goes multi-user (by explicit mounting while using the single user shell or single user mode) will be lost when the system goes multi-user. The file systems will actually be mounted but nothing will be printed about them.

FILES

/etc/mnttab mount table

/etc/vfstab list of default parameters for each file system.

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