findmnt man page on Archlinux

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FINDMNT(8)		     System Administration		    FINDMNT(8)

       findmnt - find a filesystem

       findmnt [options]

       findmnt [options] device|mountpoint

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

       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 a device name
       may be interpreted as a mountpoint (and vice versa) if the --target  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.

       -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.

       -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, --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	speci‐

	      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

		     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  --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

       -T, --target dir
	      Explicitly define the mount target (mountpoint directory).

       -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, --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.

       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 --target /mnt/foo
	      Monitors mount, unmount, remount and move on /mnt/foo.

       findmnt --poll=umount --first-only --target /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 debug output

       Karel Zak <>

       mount(8), fstab(5)

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

util-linux			  April 2010			    FINDMNT(8)

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