findmnt

Disable 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.

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. See also -I, --dfi options.

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.

Print mountpoint paths as terminal hyperlinks. The mode can be set to "always", "never", or "auto". The optional argument when can be set to "auto", "never", or "always". If the when argument is omitted, it will default to "auto". The "auto" setting means that hyperlinks will only be used if the output is on a terminal.

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.

List the available columns, use with --json or --raw to get output in machine-readable format.

Imitate the output of df(1) with its -i option. This option is equivalent to -o SOURCE,FSTYPE,INO.TOTAL,INO.USED,INO.AVAIL,INO.USE%,TARGET but excludes all pseudo filesystems. Use --all to print all filesystems.

Invert the sense of matching.

Select a filesystem using the mount node ID.

Select a filesystem using the mount node 64-bit ID, use with --kernel=listmount option.

Use JSON output format.

Reads information about filesystems from the kernel. This is the default output. The format is tree-like and only includes mount options managed by the kernel (see also --mtab). The optional argument method is supported only for the long variant (--kernel). The short variant (-k) defaults to the mountinfo method for backward compatibility. The supported methods can be either: •mountinfo - this is the default method and it reads data from the /proc/self/mountinfo file. •listmount - This is an EXPERIMENTAL method that uses the listmount() and statmount() syscalls to generate the mount table. The

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. Note that SOURCES column, use multi-line cells. In these cases, the column use an array-like formatting in the output, for example name=("aaa" "bbb" "ccc").

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 enabl

Print only pseudo filesystems.

Print only filesystems over-mounted by another filesystem.

Print only the filesystems that meet the conditions specified by the expr. This feature is EXPERIMENTAL. See also scols-filter(5). For example, include xfs having more than 50% free space:

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>). Note that column SOURCES, use multi-line cells. In these cases, the column may produce more strings on the same line.

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.

Display version and exit.