NAME

       findmnt - find a filesystem

SYNOPSIS

       findmnt [options]

       findmnt [options] device|mountpoint

       findmnt [options] [--source] device [--target path|--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-line option --target accepts any file or directory and then findmnt displays the filesystem
       for the given path.

       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).

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

       -P, --pairs
           Produce output in the form of key="value" pairs. All potentially unsafe value 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. The poll mode allows
           using 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

       --pseudo
           Print only pseudo filesystems.

       --shadow
           Print only filesystems over-mounted by another filesystem.

       -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>).

       --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).

       --shadowed
           Print only filesystems over-mounted by another filesystem.

       -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).

       --vfs-all
           When used with VFS-OPTIONS column, print all VFS (fs-independent) flags. This option is designed for
           auditing purposes to list also default VFS kernel mount options which are normally not listed.

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.

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.

AUTHORS

       Karel Zak <kzak@redhat.com>

SEE ALSO

       fstab(5), mount(8)

REPORTING BUGS

       For bug reports, use the issue tracker at https://github.com/karelzak/util-linux/issues.

AVAILABILITY

       The findmnt command is part of the util-linux package which can be downloaded from Linux Kernel Archive
       <https://www.kernel.org/pub/linux/utils/util-linux/>.