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btrfs(8)


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 as far as it stays 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

   There are several standalone tools to provide certain functionality. If
   the functionality proves to be useful, the standalone tools are
   declared obsolete and their functionality copied to the main tool. The
   deprecation period is long (years) and the obsolete binaries are still
   provided.

   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

   btrfs-show-super
       moved to btrfs inspect-internal dump-super

   btrfs-zero-log
       moved to btrfs rescue zero-log

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)



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