Ubuntu Manpages

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/fstab.d, /etc/mtab or /proc/self/mountinfo. If device or mountpoint is not given, all filesystems are shown.

The command prints all mounted filesystems in the tree-like format by default.

Print help and exit.
Search in /etc/fstab and /etc/fstab.d. The output is in the list format (see --list).
Search in /etc/mtab. The output is in the list format (see --list).
Search in /proc/self/mountinfo. The output is in the tree-like format. This is the default.
Canonicalize all printed paths.
The search direction - forward or backward.
Convert all tags (LABEL or UUID) to the device names.
Print the first matching filesystem only.
Invert the sense of matching.
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.
Do not print a [/dir] in the SOURCE column for bind-mounts or btrfs subvolumes.
Do not print a header line.
Do not truncate text in columns. The default is to not truncate the TARGET, SOURCE, UUID and LABEL columns. This option disables text truncation also in all other columns.
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 of one option does not negate the rest. For more details see mount(8).
Define output columns. Currently supported are ACTION, SOURCE, TARGET, OLD-TARGET, FSTYPE, OPTIONS, OLD-OPTIONS, VFS-OPTIONS, FS-OPTIONS, LABEL and UUID. The TARGET column contains tree formatting if the --list or --raw options are not specified.
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:

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
Use raw output format.
Use ascii characters for tree formatting.
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).
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.
Explicitly define the mount source. Supported are device, LABEL= and UUID=.
Explicitly define the mount target (mountpoint directory).
Specify an upper limit on the time for which --poll will block, in milliseconds.

Prints 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, umount, remount and move on /mnt/foo.
Waits for /mnt/foo umount.
Monitors remounts to read-only mode on all ext3 filesystems.

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/.