Provided by: util-linux_2.34-0.1ubuntu9.6_amd64 bug


       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 default.


       -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

       -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  corresponding  device

       -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

       -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 by default (see --tree).
              The output may include user space mount options.

       -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).

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

       -P, --pairs
              Use key="value" output format.  All potentially unsafe characters  are  hex-escaped

       -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

                     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

       --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 --list).

       -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 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).

       --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 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.

       -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 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.


              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 LIBSMARTCOLS_DEBUG.


       Karel Zak <>


       fstab(5), mount(8)


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