findmnt

FINDMNT(8)                   System Administration                  FINDMNT(8)

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  mount-
       point  (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  com-
              paring 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  speci-
              fied.

              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  charac-
              ters 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 informa-
              tion 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  --direc-
              tion  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 effec-
              tively 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/.

util-linux                         June 2014                        FINDMNT(8)
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