btrfs

btrfs df
btrfs: unknown token 'df'
usage: btrfs [--help] [--version] <group> [<group>...] <command> [<args>]

    btrfs subvolume create [-i <qgroupid>] [<dest>/]<name>
        Create a subvolume
    btrfs subvolume delete [options] <subvolume> [<subvolume>...]
        Delete subvolume(s)
    btrfs subvolume list [options] [-G [+|-]value] [-C [+|-]value] [--sort=gen,ogen,rootid,path] <path>
        List subvolumes (and snapshots)
    btrfs subvolume snapshot [-r] [-i <qgroupid>] <source> <dest>|[<dest>/]<name>
        Create a snapshot of the subvolume
    btrfs subvolume get-default <path>
        Get the default subvolume of a filesystem
    btrfs subvolume set-default <subvolid> <path>
        Set the default subvolume of a filesystem
    btrfs subvolume find-new <path> <lastgen>
        List the recently modified files in a filesystem
    btrfs subvolume show <subvol-path>
        Show more information of the subvolume
    btrfs subvolume sync <path> [<subvol-id>...]
        Wait until given subvolume(s) are completely removed from the filesystem.

    btrfs filesystem df [options] <path>
        Show space usage information for a mount point
    btrfs filesystem show [options] [<path>|<uuid>|<device>|label]
        Show the structure of a filesystem
    btrfs filesystem sync <path>
        Force a sync on a filesystem
    btrfs filesystem defragment [options] <file>|<dir> [<file>|<dir>...]
        Defragment a file or a directory
    btrfs filesystem resize [devid:][+/-]<newsize>[kKmMgGtTpPeE]|[devid:]max <path>
        Resize a filesystem
    btrfs filesystem label [<device>|<mount_point>] [<newlabel>]
        Get or change the label of a filesystem
    btrfs filesystem usage [options] <path> [<path>..]
        Show detailed information about internal filesystem usage .

    btrfs balance start [options] <path>
        Balance chunks across the devices
    btrfs balance pause <path>
        Pause running balance
    btrfs balance cancel <path>
        Cancel running or paused balance
    btrfs balance resume <path>
        Resume interrupted balance
    btrfs balance status [-v] <path>
        Show status of running or paused balance

    btrfs device add [options] <device> [<device>...] <path>
        Add a device to a filesystem
    btrfs device delete <device> [<device>...] <path>    btrfs device remove <device> [<device>...] <path>
        Remove a device from a filesystem
    btrfs device scan [(-d|--all-devices)|<device> [<device>...]]
        Scan devices for a btrfs filesystem
    btrfs device ready <device>
        Check device to see if it has all of its devices in cache for mounting
    btrfs device stats [-z] <path>|<device>
        Show current device IO stats. -z to reset stats afterwards.
    btrfs device usage [options] <path> [<path>..]
        Show detailed information about internal allocations in devices.

    btrfs scrub start [-BdqrRf] [-c ioprio_class -n ioprio_classdata] <path>|<device>
        Start a new scrub. If a scrub is already running, the new one fails.
    btrfs scrub cancel <path>|<device>
        Cancel a running scrub
    btrfs scrub resume [-BdqrR] [-c ioprio_class -n ioprio_classdata] <path>|<device>
        Resume previously canceled or interrupted scrub
    btrfs scrub status [-dR] <path>|<device>
        Show status of running or finished scrub

    btrfs check [options] <device>
        Check an unmounted btrfs filesystem.

    btrfs rescue chunk-recover [options] <device>
        Recover the chunk tree by scanning the devices one by one.
    btrfs rescue super-recover [options] <device>
        Recover bad superblocks from good copies
    btrfs rescue zero-log <device>
        Clear the tree log. Usable if it's corrupted and prevents mount.

    btrfs restore [options] <device> <path> | -l <device>
        Try to restore files from a damaged filesystem (unmounted)

    btrfs inspect-internal inode-resolve [-v] <inode> <path>
        Get file system paths for the given inode
    btrfs inspect-internal logical-resolve [-Pv] [-s bufsize] <logical> <path>
        Get file system paths for the given logical address
    btrfs inspect-internal subvolid-resolve <subvolid> <path>
        Get file system paths for the given subvolume ID.
    btrfs inspect-internal rootid <path>
        Get tree ID of the containing subvolume of path.
    btrfs inspect-internal min-dev-size [options] <path>
        Get the minimum size the device can be shrunk to. The

    btrfs property get [-t <type>] <object> [<name>]
        Gets a property from a btrfs object.
    btrfs property set [-t <type>] <object> <name> <value>
        Sets a property on a btrfs object.
    btrfs property list [-t <type>] <object>
        Lists available properties with their descriptions for the given object.

    btrfs send [-ve] [-p <parent>] [-c <clone-src>] [-f <outfile>] <subvol> [<subvol>...]
        Send the subvolume(s) to stdout.
    btrfs receive [-ve] [-f <infile>] [--max-errors <N>] <mount>
        Receive subvolumes from stdin.

    btrfs quota enable <path>
        Enable subvolume quota support for a filesystem.
    btrfs quota disable <path>
        Disable subvolume quota support for a filesystem.
    btrfs quota rescan [-sw] <path>
        Trash all qgroup numbers and scan the metadata again with the current config.

    btrfs qgroup assign <src> <dst> <path>
        Enable subvolume qgroup support for a filesystem.
    btrfs qgroup remove <src> <dst> <path>
        Remove a subvol from a quota group.
    btrfs qgroup create <qgroupid> <path>
        Create a subvolume quota group.
    btrfs qgroup destroy <qgroupid> <path>
        Destroy a subvolume quota group.
    btrfs qgroup show -pcreFf [--sort=qgroupid,rfer,excl,max_rfer,max_excl] <path>
        Show subvolume quota groups.
    btrfs qgroup limit [options] <size>|none [<qgroupid>] <path>
        Limit the size of a subvolume quota group.

    btrfs replace start [-Bfr] <srcdev>|<devid> <targetdev> <mount_point>
        Replace device of a btrfs filesystem.
    btrfs replace status [-1] <mount_point>
        Print status and progress information of a running device replace
    btrfs replace cancel <mount_point>
        Cancel a running device replace operation.

    btrfs help [--full]
        Display help information
    btrfs version
        Display btrfs-progs version

Use --help as an argument for information on a specific group or command.