Provided by: btrfs-progs_4.16.1-2ubuntu1_amd64 bug

NAME

       btrfs - a toolbox to manage btrfs filesystems

SYNOPSIS

       btrfs <command> [<args>]

DESCRIPTION

       The btrfs utility is a toolbox for managing btrfs filesystems. There are command groups to
       work with subvolumes, devices, for whole filesystem or other specific actions. See section
       COMMANDS.

       There are also standalone tools for some tasks like btrfs-convert or btrfstune that were
       separate historically and/or haven’t been merged to the main utility. See section
       STANDALONE TOOLS for more details.

       For other topics (mount options, etc) please refer to the separate manual page btrfs(5).

COMMAND SYNTAX

       Any command name can be shortened so long as the shortened form is unambiguous, however,
       it is recommended to use full command names in scripts. All command groups have their
       manual page named btrfs-<group>.

       For example: it is possible to run btrfs sub snaps instead of btrfs subvolume snapshot.
       But btrfs file s is not allowed, because file s may be interpreted both as filesystem show
       and as filesystem sync.

       If the command name is ambiguous, the list of conflicting options is printed.

       For an overview of a given command use btrfs command --help or btrfs [command...] --help
       --full to print all available options.

COMMANDS

       balance
           Balance btrfs filesystem chunks across single or several devices.

           See btrfs-balance(8) for details.

       check
           Do off-line check on a btrfs filesystem.

           See btrfs-check(8) for details.

       device
           Manage devices managed by btrfs, including add/delete/scan and so on.

           See btrfs-device(8) for details.

       filesystem
           Manage a btrfs filesystem, including label setting/sync and so on.

           See btrfs-filesystem(8) for details.

       inspect-internal
           Debug tools for developers/hackers.

           See btrfs-inspect-internal(8) for details.

       property
           Get/set a property from/to a btrfs object.

           See btrfs-property(8) for details.

       qgroup
           Manage quota group(qgroup) for btrfs filesystem.

           See btrfs-qgroup(8) for details.

       quota
           Manage quota on btrfs filesystem like enabling/rescan and etc.

           See btrfs-quota(8) and btrfs-qgroup(8) for details.

       receive
           Receive subvolume data from stdin/file for restore and etc.

           See btrfs-receive(8) for details.

       replace
           Replace btrfs devices.

           See btrfs-replace(8) for details.

       rescue
           Try to rescue damaged btrfs filesystem.

           See btrfs-rescue(8) for details.

       restore
           Try to restore files from a damaged btrfs filesystem.

           See btrfs-restore(8) for details.

       scrub
           Scrub a btrfs filesystem.

           See btrfs-scrub(8) for details.

       send
           Send subvolume data to stdout/file for backup and etc.

           See btrfs-send(8) for details.

       subvolume
           Create/delete/list/manage btrfs subvolume.

           See btrfs-subvolume(8) for details.

STANDALONE TOOLS

       New functionality could be provided using a standalone tool. If the functionality proves
       to be useful, then the standalone tool is declared obsolete and its functionality is
       copied to the main tool. Obsolete tools are removed after a long (years) depreciation
       period.

       Tools that are still in active use without an equivalent in btrfs:

       btrfs-convert
           in-place conversion from ext2/3/4 filesystems to btrfs

       btrfstune
           tweak some filesystem properties on a unmounted filesystem

       btrfs-select-super
           rescue tool to overwrite primary superblock from a spare copy

       btrfs-find-root
           rescue helper to find tree roots in a filesystem

       Deprecated and obsolete tools:

       btrfs-debug-tree
           moved to btrfs inspect-internal dump-tree. Removed from source distribution.

       btrfs-show-super
           moved to btrfs inspect-internal dump-super, standalone removed.

       btrfs-zero-log
           moved to btrfs rescue zero-log, standalone removed.

EXIT STATUS

       btrfs returns a zero exit status if it succeeds. Non zero is returned in case of failure.

AVAILABILITY

       btrfs is part of btrfs-progs. Please refer to the btrfs wiki http://btrfs.wiki.kernel.org
       for further details.

SEE ALSO

       btrfs-balance(8), btrfs-check(8), btrfs-convert(8), btrfs-device(8), btrfs-filesystem(8),
       btrfs-inspect-internal(8), btrfs-property(8), btrfs-qgroup(8), btrfs-quota(8),
       btrfs-receive(8), btrfs-replace(8), btrfs-rescue(8), btrfs-restore(8), btrfs-scrub(8),
       btrfs-send(8), btrfs-subvolume(8), btrfstune(8), mkfs.btrfs(8)