NAME
findmnt - find a filesystemSYNOPSIS
findmnt [options]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.OPTIONS
-A, --allDisable all built-in filters and print all
filesystems.
Use ascii characters for tree
formatting.
Print the sizes in bytes rather than in a
human-readable format.
By default, the unit, sizes are expressed in, is byte, and unit prefixes are in
power of 2^10 (1024). Abbreviations of symbols are exhibited truncated in
order to reach a better readability, by exhibiting alone the first letter of
them; examples: "1 KiB" and "1 MiB" are respectively
exhibited as "1 K" and "1 M", then omitting on purpose the
mention "iB", which is part of these abbreviations.
Do not canonicalize paths at all. This option
affects the comparing of paths and the evaluation of tags (LABEL, UUID,
etc.).
Canonicalize all printed paths.
Print filesystems where target (mountpoint) is
marked as deleted by kernel.
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.
The search direction, either forward or
backward.
Convert all tags (LABEL, UUID, PARTUUID, or
PARTLABEL) to the corresponding device names for the SOURCE column.
It’s an unusual situation, but the same tag may be duplicated (used for
more devices). For this purpose, there is SOURCES (pl.) column. This column
displays by multi-line cell all devices where the tag is detected by libblkid.
This option makes sense for fstab only.
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).
Print the first matching filesystem
only.
Invert the sense of matching.
Use JSON output format.
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).
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.
Explicitly define the mountpoint file or
directory. See also --target.
Search in /etc/mtab. The output is in
the list format by default (see --tree). The output may include user
space mount options.
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.
Do not print a header line.
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.
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 almost all available columns. The
columns that require --poll are not included.
Produce output in the form of
key="value" pairs. All potentially unsafe value characters are
hex-escaped (\x<code>). See also option --shell.
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
OLD-TARGET
OLD-OPTIONS
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
Print only pseudo filesystems.
Print only filesystems over-mounted by another
filesystem.
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.
Use raw output format. All potentially unsafe
characters are hex-escaped (\x<code>).
Print only real filesystems.
Explicitly define the mount source. Supported
specifications are device, maj:min,
LABEL=label, UUID=uuid,
PARTLABEL=label and PARTUUID=uuid.
Search in /etc/fstab. The output is in
the list format (see --list).
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.
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).
Enable tree-like output if possible. The
options is silently ignored for tables where is missing child-parent relation
(e.g., fstab).
Print only filesystems over-mounted by another
filesystem.
Ignore filesystems with duplicate mount
targets, thus effectively skipping over-mounted mount points.
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.
Do not print a [/dir] in the SOURCE column for
bind mounts or btrfs subvolumes.
Specify an upper limit on the time for which
--poll will block, in milliseconds.
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.
Force findmnt to print more information
( --verify only for now).
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.
The column name will be modified to contain
only characters allowed for shell variable identifiers. This is usable, for
example, with --pairs. Note that this feature has been automatically
enabled for --pairs in version 2.37, but due to compatibility issues,
now it’s necessary to request this behavior by --shell.
Display help text and exit.
Print version and exit.
EXIT STATUS
The exit value is 0 if there is something to display, or 1 on any error (for example if no filesystem is found based on the user’s filter specification, or the device path or mountpoint does not exist).ENVIRONMENT
LIBMOUNT_FSTAB=<path>overrides the default location of the
fstab file
overrides the default location of the
mtab file
enables libmount debug output
enables libsmartcols debug output
use visible padding characters.
EXAMPLES
findmnt --fstab -t nfsPrints all NFS filesystems defined in
/etc/fstab.
Prints all /etc/fstab filesystems where
the mountpoint directory is /mnt/foo. It also prints bind mounts where
/mnt/foo is a source.
Prints all /etc/fstab filesystems where
the mountpoint directory is /mnt/foo.
Prints all /etc/fstab filesystems and
converts LABEL= and UUID= tags to the real device names.
Prints only the mountpoint where the
filesystem with label "/boot" is mounted.
Monitors mount, unmount, remount and move on
/mnt/foo.
Waits for /mnt/foo unmount.
Monitors remounts to read-only mode on all
ext3 filesystems.
AUTHORS
Karel <[email protected]>ZakSEE ALSO
fstab(5), mount(8)REPORTING BUGS
For bug reports, use the issue tracker at <https://github.com/util-linux/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/>.2022-05-11 | util-linux 2.38.1 |