btrfs

Manage btrfs copy-on-write filesystems

TLDR

Create subvolume

$ sudo btrfs subvolume create path/to/subvolume

List subvolumes

$ sudo btrfs subvolume list path/to/mount

Show space usage

$ sudo btrfs filesystem df path/to/mount

Enable quota

$ sudo btrfs quota enable path/to/subvolume

Show quota

$ sudo btrfs qgroup show path/to/subvolume

SYNOPSIS

btrfs command [OPTIONS] [path]

btrfs is the primary management tool for Btrfs (B-tree filesystem), a modern copy-on-write Linux filesystem with built-in support for snapshots, subvolumes, transparent compression, online resizing, multi-device pools, checksumming, and RAID0/1/10/5/6. The command dispatches to subcommand groups (subvolume, filesystem, device, balance, scrub, send, receive, quota, qgroup, inspect-internal, ...) that map directly to filesystem operations.Most subcommands operate on a mounted Btrfs path. The kernel does the heavy lifting; the btrfs binary issues IOCTLs to invoke balance, scrub, snapshot, defrag, and other operations. The send / receive pair enables efficient incremental replication of snapshots to remote hosts or backup volumes.

PARAMETERS

subvolume (su)

Manage subvolumes and snapshots

filesystem (fi)

Manage filesystem properties

device (dev)

Manage devices in the filesystem

balance (bal)

Balance data across devices

scrub (sc)

Verify data integrity

quota (qu)

Enable/disable quota support

qgroup (qg)

Manage quota groups

CAVEATS

Btrfs is under active development. Some features like RAID5/6 may have stability concerns. Regular scrubs are recommended for data integrity verification. Snapshots share space with their source until modified.

HISTORY

btrfs is the management tool for the B-tree file system, a modern Linux filesystem featuring advanced storage capabilities.