Provided by: mount_2.27.1-6ubuntu3.10_amd64 
NAME
findmnt - find a filesystem
SYNOPSIS
findmnt [options]
findmnt [options] device|mountpoint
findmnt [options] [--source] device [--target|--mountpoint] mountpoint
DESCRIPTION
findmnt will list all mounted filesytems or search for a filesystem. The findmnt command is able to
search in /etc/fstab, /etc/mtab or /proc/self/mountinfo. If device or mountpoint is not given, all
filesystems are shown.
The device may be specified by device name, maj:min, filesystem LABEL or UUID, or partition PARTUUID or
PARTLABEL. Note that findmnt follows mount(8) behavior where a device name may be interpreted as a
mountpoint (and vice versa) if the --target, --mountpoint or --source options are not specified.
The command prints all mounted filesystems in the tree-like format by default.
OPTIONS
-A, --all
Disable all built-in filters and print all filesystems.
-a, --ascii
Use ascii characters for tree formatting.
-b, --bytes
Print the SIZE, USED and AVAIL column in bytes rather than in a human-readable format.
-C, --nocanonicalize
Do not canonicalize paths at all. This option affects the comparing of paths and the evaluation
of tags (LABEL, UUID, etc.).
-c, --canonicalize
Canonicalize all printed paths.
-D, --df
Imitate the output of df(1). This option is equivalent to -o
SOURCE,FSTYPE,SIZE,USED,AVAIL,USE%,TARGET but excludes all pseudo filesystems. Use --all to print
all filesystems.
-d, --direction word
The search direction, either forward or backward.
-e, --evaluate
Convert all tags (LABEL, UUID, PARTUUID or PARTLABEL) to the device names.
-F, --tab-file path
Search in an alternative file. If used with --fstab, --mtab or --kernel, then it overrides the
default paths. If specified more than once, then tree-like output is disabled (see the --list
option).
-f, --first-only
Print the first matching filesystem only.
-h, --help
Display help text and exit.
-i, --invert
Invert the sense of matching.
-J, --json
Use JSON output format.
-k, --kernel
Search in /proc/self/mountinfo. The output is in the tree-like format. This is the default.
-l, --list
Use the list output format. This output format is automatically enabled if the output is
restricted by the -t, -O, -S or -T option and the option --submounts is not used or if more that
one source file (the option -F) is specified.
-M, --mountpoint path
Explicitly define the mountpoint file or directory. See also --target.
-m, --mtab
Search in /etc/mtab. The output is in the list format (see --list).
-N, --task tid
Use alternative namespace /proc/<tid>/mountinfo rather than the default /proc/self/mountinfo. If
the option is specified more than once, then tree-like output is disabled (see the --list option).
See also the unshare(1) command.
-n, --noheadings
Do not print a header line.
-O, --options list
Limit the set of printed filesystems. More than one option may be specified in a comma-separated
list. The -t and -O options are cumulative in effect. It is different from -t in that each
option is matched exactly; a leading no at the beginning does not have global meaning. The "no"
can used for individual items in the list. The "no" prefix interpretation can be disabled by "+"
prefix.
-o, --output list
Define output columns. See the --help output to get a list of the currently supported columns.
The TARGET column contains tree formatting if the --list or --raw options are not specified.
The default list of columns may be extended if list is specified in the format +list (e.g. findmnt
-o +PROPAGATION).
-P, --pairs
Use key="value" output format. All potentially unsafe characters are hex-escaped (\x<code>).
-p, --poll[=list]
Monitor changes in the /proc/self/mountinfo file. Supported actions are: mount, umount, remount
and move. More than one action may be specified in a comma-separated list. All actions are
monitored by default.
The time for which --poll will block can be restricted with the --timeout or --first-only options.
The standard columns always use the new version of the information from the mountinfo file, except
the umount action which is based on the original information cached by findmnt(8). The poll mode
allows to use extra columns:
ACTION mount, umount, move or remount action name; this column is enabled by default
OLD-TARGET
available for umount and move actions
OLD-OPTIONS
available for umount and remount actions
-R, --submounts
Print recursively all submounts for the selected filesystems. The restrictions defined by options
-t, -O, -S, -T and --direction are not applied to submounts. All submounts are always printed in
tree-like order. The option enables the tree-like output format by default. This option has no
effect for --mtab or --fstab.
-r, --raw
Use raw output format. All potentially unsafe characters are hex-escaped (\x<code>).
-S, --source spec
Explicitly define the mount source. Supported are device, maj:min, LABEL=, UUID=, PARTLABEL= or
PARTUUID=.
-s, --fstab
Search in /etc/fstab. The output is in the list format (see --list).
-T, --target path
Define the mount target. If the path is not a mountpoint file or directory, then findmnt checks
path elements in reverse order to get the mountpoint (this feature is supported only if search in
kernel files and unsupported for --fstab). It's recommended to use the option --mountpoint when
checks of path elements is unwanted and path is a strictly specified mountpoint.
-t, --types list
Limit the set of printed filesystems. More than one type may be specified in a comma-separated
list. The list of filesystem types can be prefixed with no to specify the filesystem types on
which no action should be taken. For more details see mount(8).
-U, --uniq
Ignore filesystems with duplicate mount targets, thus effectively skipping over-mounted mount
points.
-u, --notruncate
Do not truncate text in columns. The default is to not truncate the TARGET, SOURCE, UUID, LABEL,
PARTUUID, PARTLABEL columns. This option disables text truncation also in all other columns.
-v, --nofsroot
Do not print a [/dir] in the SOURCE column for bind-mounts or btrfs subvolumes.
-w, --timeout milliseconds
Specify an upper limit on the time for which --poll will block, in milliseconds.
EXAMPLES
findmnt --fstab -t nfs
Prints all NFS filesystems defined in /etc/fstab.
findmnt --fstab /mnt/foo
Prints all /etc/fstab filesystems where the mountpoint directory is /mnt/foo. It also prints bind
mounts where /mnt/foo is a source.
findmnt --fstab --target /mnt/foo
Prints all /etc/fstab filesystems where the mountpoint directory is /mnt/foo.
findmnt --fstab --evaluate
Prints all /etc/fstab filesystems and converts LABEL= and UUID= tags to the real device names.
findmnt -n --raw --evaluate --output=target LABEL=/boot
Prints only the mountpoint where the filesystem with label "/boot" is mounted.
findmnt --poll --mountpoint /mnt/foo
Monitors mount, unmount, remount and move on /mnt/foo.
findmnt --poll=umount --first-only --mountpoint /mnt/foo
Waits for /mnt/foo unmount.
findmnt --poll=remount -t ext3 -O ro
Monitors remounts to read-only mode on all ext3 filesystems.
ENVIRONMENT
LIBMOUNT_FSTAB=<path>
overrides the default location of the fstab file
LIBMOUNT_MTAB=<path>
overrides the default location of the mtab file
LIBMOUNT_DEBUG=all
enables libmount debug output
LIBSMARTCOLS_DEBUG=all
enables libsmartcols debug output
AUTHORS
Karel Zak <kzak@redhat.com>
SEE ALSO
mount(8), fstab(5)
AVAILABILITY
The findmnt command is part of the util-linux package and is available from
ftp://ftp.kernel.org/pub/linux/utils/util-linux/.