findmnt(8) — Linux manual page


FINDMNT(8)                  System Administration                 FINDMNT(8)

NAME         top

       findmnt - find a filesystem

SYNOPSIS         top

       findmnt [options]

       findmnt [options] device|mountpoint

       findmnt [options] [--source] device [--target|--mountpoint]

DESCRIPTION         top

       findmnt will list all mounted filesystems 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, major:minor numbers,
       filesystem label or UUID, or partition label or UUID.  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

OPTIONS         top

       -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 columns 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,

       -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
              corresponding 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.  The output contains only
              mount options maintained by kernel (see also --mtab).

       -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

       -m, --mtab
              Search in /etc/mtab.  The output is in the list format by
              default (see --tree).  The output may include user space mount

       -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

              The default list of columns may be extended if list is
              specified in the format +list (e.g., findmnt -o +PROPAGATION).

              Output almost all available columns.  The columns that require
              --poll are not included.

       -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 using extra columns:

              ACTION mount, umount, move or remount action name; this column
                     is enabled by default

                     available for umount and move actions

                     available for umount and remount actions

              Print only pseudo filesystems.

       -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>).

       --real Print only real filesystems.

       -S, --source spec
              Explicitly define the mount source.  Supported specifications
              are device, maj:min, LABEL=label, UUID=uuid, PARTLABEL=label
              and PARTUUID=uuid.

       -s, --fstab
              Search in /etc/fstab.  The output is in the list format (see

       -T, --target path
              Define the mount target.  If path is not a mountpoint file or
              directory, then findmnt checks the path elements in reverse
              order to get the mountpoint (this feature is supported only
              when searching in kernel files and unsupported for --fstab).
              It's recommended to use the option --mountpoint when checks of
              path elements are unwanted and path is a strictly specified

       -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).

       --tree Enable tree-like output if possible.  The options is silently
              ignored for tables where is missing child-parent relation
              (e.g., fstab).

       -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
              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.

       -x, --verify
              Check mount table content. The default is to verify /etc/fstab
              parsability and usability. It's possible to use this option
              also with --tab-file.  It's possible to specify source
              (device) or target (mountpoint) to filter mount table. The
              option --verbose forces findmnt to print more details.

              Force findmnt to print more information (--verify only for

ENVIRONMENT         top

              overrides the default location of the fstab file

              overrides the default location of the mtab file

              enables libmount debug output

              enables libsmartcols debug output

              use visible padding characters. Requires enabled

EXAMPLE         top

       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.

AUTHORS         top

       Karel Zak <>

SEE ALSO         top

       fstab(5), mount(8)

AVAILABILITY         top

       The findmnt command is part of the util-linux package and is
       available from

COLOPHON         top

       This page is part of the util-linux (a random collection of Linux
       utilities) project.  Information about the project can be found at 
       ⟨⟩.  If you have a
       bug report for this manual page, send it to  This page was obtained from the
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       ⟨git://⟩ on
       2020-11-01.  (At that time, the date of the most recent commit that
       was found in the repository was 2020-10-21.)  If you discover any
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       (which is not part of the original manual page), send a mail to

util-linux                        May 2018                        FINDMNT(8)

Pages that refer to this page: eject(1)mount(2)fstab(5)mount_namespaces(7)blkid(8)findmnt(8)lsblk(8)mount(8)