bionic (8) findmnt.8.gz

Provided by: util-linux_2.31.1-0.4ubuntu3.7_amd64 bug

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 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.

        --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/.