FINDMNT(8) manual page
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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 default.
- -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 column 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 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 --list).
- -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 are device,
maj:min, LABEL=, UUID=, PARTLABEL= or PARTUUID=.
- -s, --fstab
- Search in /etc/fstab.
The output is in the list format (see --list).
- -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 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.
- 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 --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.
- LIBMOUNT_FSTAB=<path>
- overrides the default location
of the fstab file
- LIBMOUNT_MTAB=<path>
- overrides the default location of the
mtab file
- LIBMOUNT_DEBUG=0xffff
- enables debug output
Karel Zak <kzak@redhat.com>
mount(8)
, fstab(5)
The findmnt command is part of the
util-linux package and is available from ftp://ftp.kernel.org/pub/linux/utils/util-linux/.
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