mountpoint

see if a directory or file is a mountpoint

TLDR

Check if a directory is a mountpoint

$ mountpoint [path/to/directory]
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Check if a directory is a mountpoint without showing any output

$ mountpoint -q [path/to/directory]
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Show major/minor numbers of a mountpoint's filesystem

$ mountpoint --fs-devno [path/to/directory]
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SYNOPSIS

mountpoint [-d|-q] directory|file

mountpoint -x device

DESCRIPTION

mountpoint checks whether the given directory or file is mentioned in the /proc/self/mountinfo file.

OPTIONS

-d, --fs-devno

Show the major/minor numbers of the device that is mounted on the given directory.

-q, --quiet

Be quiet - don’t print anything.

--nofollow

Do not follow symbolic link if it the last element of the directory path.

-x, --devno

Show the major/minor numbers of the given blockdevice on standard output.

-V, --version

Display version information and exit.

-h, --help

Display help text and exit.

EXIT STATUS

mountpoint has the following exit status values:

0

success; the directory is a mountpoint, or device is block device on --devno

1

failure; incorrect invocation, permissions or system error

32

failure; the directory is not a mountpoint, or device is not a block device on --devno

ENVIRONMENT

LIBMOUNT_DEBUG=all

enables libmount debug output.

NOTES

The util-linux mountpoint implementation was written from scratch for libmount. The original version for sysvinit suite was written by Miquel van Smoorenburg.

AUTHORS

REPORTING BUGS

For bug reports, use the issue tracker at <https://github.com/karelzak/util-linux/issues>.

AVAILABILITY

The mountpoint command is part of the util-linux package which can be downloaded from Linux Kernel Archive <https://www.kernel.org/pub/linux/utils/util-linux/>.

SEE ALSO

mount(8)

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