Windows PowerShell command on Get-command mount

Manual Pages for UNIX Operating System command usage for man mount

System Administration Commands mount(1M)

NAME

mount, umount - mount or unmount file systems and remote

resources

SYNOPSIS

mount [-p | -v]

mount [-F FSType] [generic_options] [-o specific_options]

[-O] special | mount_point

mount [-F FSType] [generic_options] [-o specific_options]

[-O] special mount_point

mount -a [-F FSType] [-V] [current_options]

[-o specific_options] [mount_point]...

umount [-f] [-V] [-o specific_options] special | mount_point

umount -a [-f] [-V] [-o specific_options] [mount_point]...

DESCRIPTION

mount attaches a file system to the file system hierarchy at

the mount_point, which is the pathname of a directory. If

mount_point has any contents prior to the mount operation,

these are hidden until the file system is unmounted.

umount unmounts a currently mounted file system, which may

be specified either as a mount_point or as special, the dev-

ice on which the file system resides.

The table of currently mounted file systems can be found by

examining the mounted file system information file. This is

provided by a file system that is usually mounted on

/etc/mnttab. The mounted file system information is

described in mnttab(4). Mounting a file system adds an entry

to the mount table; a umount removes an entry from the

table.

When invoked with both the special and mount_point arguments

and the -F option, mount validates all arguments except for

special and invokes the appropriate FSType-specific mount

module. If invoked with no arguments, mount lists all the

mounted file systems recorded in the mount table,

SunOS 5.11 Last change: 13 Sep 2010 1

System Administration Commands mount(1M)

/etc/mnttab. If invoked with a partial argument list (with

only one of special or mount_point, or with both special or

mount_point specified but not FSType), mount will search

/etc/vfstab for an entry that will supply the missing argu-

ments. If no entry is found, and the special argument starts with /, the default local file system type specified in /etc/default/fs will be used. Otherwise the default remote

file system type will be used. The default remote file sys-

tem type is determined by the first entry in the /etc/dfs/fstypes file. After filling in missing arguments,

mount will invoke the FSType-specific mount module.

For file system types that support it, a file can be mounted

directly as a file system by specifying the full path to the file as the special argument. In such a case, the nosuid option is enforced. If specific file system support for such

loopback file mounts is not present, you can still use

lofiadm(1M) to mount a file system image. In this case, no

special options are enforced. Only a user with sufficient privilege (at least

PRIV_SYS_MOUNT) can mount or unmount file systems using

mount and umount. However, any user can use mount to list

mounted file systems and resources.

OPTIONS

-F FSType

Used to specify the FSType on which to operate. The FSType must be specified or must be determinable from /etc/vfstab, or by consulting /etc/default/fs or /etc/dfs/fstypes.

-a [ mount_points. . . ]

Perform mount or umount operations in parallel, when

possible.

If mount points are not specified, mount will mount all

file systems whose /etc/vfstab "mount at boot" field is

yes. If mount points are specified, then /etc/vfstab

"mount at boot" field will be ignored.

If mount points are specified, umount will only umount

those mount points. If none is specified, then umount

will attempt to unmount all file systems in /etc/mnttab,

with the exception of certain system required file sys-

tems: /, /usr, /var, /var/adm, /var/run, /proc, /dev/fd and /tmp.

SunOS 5.11 Last change: 13 Sep 2010 2

System Administration Commands mount(1M)

-f

Forcibly unmount a file system.

Without this option, umount does not allow a file system

to be unmounted if a file on the file system is busy.

Using this option can cause data loss for open files; programs which access files after the file system has

been unmounted will get an error (EIO).

-p

Print the list of mounted file systems in the

/etc/vfstab format. Must be the only option specified.

See BUGS.

-v

Print the list of mounted file systems in verbose for-

mat. Must be the only option specified.

-V

Echo the complete command line, but do not execute the

command. umount generates a command line by using the

options and arguments provided by the user and adding to them information derived from /etc/mnttab. This option should be used to verify and validate the command line.

generic_options

Options that are commonly supported by most FSType-

specific command modules. The following options are available:

-m

Mount the file system without making an entry in /etc/mnttab.

-g

Globally mount the file system. On a clustered sys-

tem, this globally mounts the file system on all

nodes of the cluster. On a non-clustered system this

has no effect.

SunOS 5.11 Last change: 13 Sep 2010 3

System Administration Commands mount(1M)

-o

Specify FSType-specific options in a comma separated

(without spaces) list of suboptions and keyword-

attribute pairs for interpretation by the FSType-

specific module of the command. (See mount_ufs(1M).)

When you use -o with a file system that has an entry

in /etc/vfstab, any mount options entered for that

file system in /etc/vfstab are ignored. The following options are supported: devices | nodevices

Allow or disallow the opening of device-special

files. The default is devices. If you use nosuid in conjunction with devices, the behavior is equivalent to that of nosuid. exec | noexec Allow or disallow executing programs in the file

system. Allow or disallow mmap(2) with PROT_EXEC

for files within the file system. The default is exec. loop Ignored for compatibility. nbmand | nonbmand

Allow or disallow non-blocking mandatory locking

semantics on this file system. Non-blocking man-

datory locking is disallowed by default.

If the file system is mounted with the nbmand

option, then applications can use the fcntl(2)

interface to place non-blocking mandatory locks

on files and the system enforces those seman-

tics. If you enable this option, it can cause

standards conformant applications to see unex-

pected errors. To avoid the possibility of obtaining mandatory locks on system files, do not use the nbmand option with the following file systems:

SunOS 5.11 Last change: 13 Sep 2010 4

System Administration Commands mount(1M)

/ /usr /etc /var /proc /dev /devices /system/contract /system/object /etc/mnttab /etc/dfs/sharetab

Do not use the remount option to change the

nbmand disposition of the file system. The

nbmand option is mutually exclusive of the glo-

bal option. See -g.

ro | rw

Specify read-only or read-write. The default is

rw. setuid | nosetuid Allow or disallow setuid or setgid execution. The default is setuid. If you specify setuid in conjunction with nosuid, the behavior is the same as nosuid. nosuid is equivalent to nosetuid and nodevices. When suid or nosuid is combined with setuid or

nosetuid and devices or nodevices, the most res-

trictive options take effect. This option is highly recommended whenever the file system is shared by way of NFS with the root= option. Without it, NFS clients could add setuid programs to the server or create devices that could open security holes. suid | nosuid Allow or disallow setuid or setgid execution. The default is suid. This option also allows or

disallows opening any device-special entries

that appear within the filesystem.

SunOS 5.11 Last change: 13 Sep 2010 5

System Administration Commands mount(1M)

nosuid is equivalent to nosetuid and nodevices. When suid or nosuid is combined with setuid or

nosetuid and devices or nodevices, the most res-

trictive options take effect. This option is highly recommended whenever the file system is shared using NFS with the root=option, because, without it, NFS clients could add setuid programs to the server, or create devices that could open security holes. rstchown | norstchown Allow or disallow restricted chown. If the file

system is mounted with rstchown, the owner of

the file is prevented from changing the owner ID

of the file. If the file system is mounted with

norstchown, the user can permit ownership

changes for files they own. Only the super-user

or a user with appropriate privilege can arbi-

trarily change owner IDs.

-O

Overlay mount. Allow the file system to be mounted

over an existing mount point, making the underlying

file system inaccessible. If a mount is attempted on

a pre-existing mount point without setting this

flag, the mount will fail, producing the error "dev-

ice busy".

-r

Mount the file system read-only.

EXAMPLES

Example 1 Mounting and Unmounting a DVD Image Directly

The following commands mount and unmount a DVD image.

# mount -F hsfs /images/solaris.iso /mnt/solaris-image

# umount /mnt/solaris-image

SunOS 5.11 Last change: 13 Sep 2010 6

System Administration Commands mount(1M)

USAGE

See largefile(5) for the description of the behavior of

mount and umount when encountering files greater than or

equal to 2 Gbyte ( 2^31 bytes). FILES /etc/mnttab

Table of mounted file systems.

/etc/default/fs Default local file system type. Default values can be set for the following flags in /etc/default/fs. For example: LOCAL=ufs LOCAL: The default partition for a command if no FSType is specified. /etc/vfstab List of default parameters for each file system.

ATTRIBUTES

See attributes(5) for descriptions of the following attri-

butes:

____________________________________________________________

| ATTRIBUTE TYPE | ATTRIBUTE VALUE |

|_____________________________|_____________________________|

| Availability | SUNWcs |

|_____________________________|_____________________________|

lofiadm(1M), mount_hsfs(1M), mount_nfs(1M), mount_pcfs(1M),

mount_smbfs(1M), mount_tmpfs(1M), mount_udfs(1M),

mount_ufs(1M), mountall(1M), umountall(1M), fcntl(2),

mmap(2), mnttab(4), vfstab(4), attributes( 5), largefile(5), privileges(5), lofs(7FS), pcfs(7FS) NOTES

If the directory on which a file system is to be mounted is

a symbolic link, the file system is mounted on the directory

SunOS 5.11 Last change: 13 Sep 2010 7

System Administration Commands mount(1M)

to which the symbolic link refers, rather than on top of the symbolic link itself.

BUGS

The mount -p output is incorrect for cachefs.

SunOS 5.11 Last change: 13 Sep 2010 8