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.
−a |
Scans all devices present in the system for btrfs filesystem. |
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−c |
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 http://btrfs.wiki.kernel.org for further details.