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findmnt(8) [bsd man page]

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 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.

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 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, 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 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 --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).

       -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 specifications are device, maj:min, LABEL=label, UUID=uuid, PARTLABEL=label and  PAR-
	      TUUID=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.

	--verbose
	      Force findmnt to print more information (--verify only for now).

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

       LIBSMARTCOLS_DEBUG_PADDING=on
	      use visible padding characters. Requires enabled LIBSMARTCOLS_DEBUG.

AUTHORS
       Karel Zak <kzak@redhat.com>

SEE ALSO
       fstab(5), mount(8)

AVAILABILITY
       The findmnt command is part of the util-linux package and is available from https://www.kernel.org/pub/linux/utils/util-linux/.

util-linux							     June 2015								FINDMNT(8)

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