findmnt - find a filesystem


   findmnt [options]

   findmnt [options] device|mountpoint

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


   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


   -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.

   -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 (see

   -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).

   -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

                 available for umount and move actions

                 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  specifications
          are device, maj:min, LABEL=label, UUID=uuid, PARTLABEL=label and

   -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).

   -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
          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 now).


   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

   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.


          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


   Karel Zak <>


   mount(8), fstab(5)


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


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