tldr/pages.zh/linux/btrfs.md

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# btrfs
> 一种基于写时复制COW原理的 Linux 文件系统。
> 此命令也有关于其子命令的文件,例如:`btrfs device`.
> 更多信息:<https://btrfs.wiki.kernel.org/index.php/Manpage/btrfs>.
- 创建子卷:
`sudo btrfs subvolume create {{指向子卷的路径}}`
- 列出子卷:
`sudo btrfs subvolume list {{指向挂载点的路径}}`
- 显示空间使用情况信息:
`sudo btrfs filesystem df {{指向挂载点的路径}}`
- 启用配额quota
`sudo btrfs quota enable {{指向子卷的路径}}`
- 显示配额quota
`sudo btrfs qgroup show {{指向子卷的路径}}`