FINDMNT(8) System Administration FINDMNT(8)NAMEfindmnt - find a filesystem
SYNOPSISfindmnt [options]
findmnt [options] device|mountpoint
findmnt [options] [--source] device [--target] mountpoint
DESCRIPTIONfindmnt 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 device name may
be interpreted as mountpoint (and vice versa) if --target or --source
options are not specified.
The command prints all mounted filesystems in the tree-like format by
default.
OPTIONS-h, --help
Print help and exit.
-s, --fstab
Search in /etc/fstab. The output is in the list format (see
--list).
-m, --mtab
Search in /etc/mtab. The output is in the list format (see
--list).
-k, --kernel
Search in /proc/self/mountinfo. The output is in the tree-like
format. This is the default.
-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 filesystem. Use --all to print all filesystems.
-d, --direction word
The search direction - 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 overwrites 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.
-i, --invert
Invert the sense of matching.
-l, --list
Use the list output format. This output format is automatically
enabled if the output is restricted by -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.
-v, --nofsroot
Do not print a [/dir] in the SOURCE column for bind-mounts or
btrfs subvolumes.
-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 unshare(1) command.
-n, --noheadings
Do not print a header line.
-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.
-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" could used for individual
items in the list. The "no" prefix interpratation could be dis‐
abled by "+" prefix.
-o, --output list
Define output columns. See the --help output to get list of the
currently supported columns. The TARGET column contains tree
formatting if the --list or --raw options are not specified.
-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
OLD-TARGET
available for umount and move actions
OLD-OPTIONS
available for umount and remount actions
-P, --pairs
Use key="value" output format. All potentially unsafe characters
are hex-escaped (\x<code>).
-r, --raw
Use raw output format. All potentially unsafe characters are
hex-escaped (\x<code>).
-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).
-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.
-S, --source spec
Explicitly define the mount source. Supported are device,
maj:min, LABEL=, UUID=, PARTLABEL= or PARTUUID=.
-T, --target dir
Explicitly define the mount target (mountpoint directory).
-w, --timeout milliseconds
Specify an upper limit on the time for which --poll will block,
in milliseconds.
EXAMPLESfindmnt--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, umount, remount and move on /mnt/foo.
findmnt --poll=umount --first-only --target /mnt/foo
Waits for /mnt/foo umount.
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=0xffff
enables debug output
AUTHORS
Karel Zak <kzak@redhat.com>
SEE ALSOmount(8), fstab(5)AVAILABILITY
The findmnt command is part of the util-linux package and is available
from ftp://ftp.kernel.org/pub/linux/utils/util-linux/.
util-linux April 2010 FINDMNT(8)
