btrfsctl (8) - Linux Manuals

btrfsctl: control a btrfs filesystem


btrfsctl - control a btrfs filesystem


btrfsctl [ -d file|directory ] [ -s snapshot-name directory ] [ -S subvolume-name directory ] [ -r [+-]size ] [ -A device ] [ -a ] [ -c ]


B btrfsctl is deprecated. Please consider to switch to the btrfs utility.


btrfsctl is used to control the filesystem and the files and directories stored. It is the tool to create a new snapshot for the filesystem.


-d file|directory
Defragment a file or a directory. If the argument is a directory, the entire b-tree under the directory is defragged.
-s snapshot-name directory
Creates a new snapshot of the directory specified.
-S subvolume-name directory
Creates a new subvolume.
-r [+|-]size
Resizes the filesystem with the size specified. If the value is preceded with a signed symbol, the filesystem is resized with respect to the current filesystem size. size can be suffixed by k,m or g to represent kilobytes, megabytes, or gigabytes respectively.
-A device
Scans the device for btrfs filesystem.
Scans all devices present in the system for btrfs filesystem.
Forces a filesystem sync.


btrfsctl is part of btrfs-progs. Btrfs is currently under heavy development, and not suitable for any uses other than benchmarking and review. Please refer to the btrfs wiki for further details.