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28 lines
885 B
Markdown
28 lines
885 B
Markdown
# btrfs filesystem
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> Manage btrfs filesystems.
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> More information: <https://btrfs.wiki.kernel.org/index.php/Manpage/btrfs-filesystem>.
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- Show filesystem usage (optionally run as root to show detailed information):
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`btrfs filesystem usage {{path/to/btrfs_mount}}`
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- Show usage by individual devices:
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`sudo btrfs filesystem show {{path/to/btrfs_mount}}`
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- Defragment a single file on a btrfs filesystem (avoid while a deduplication agent is running):
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`sudo btrfs filesystem defragment -v {{path/to/file}}`
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- Defragment a directory recursively (does not cross subvolume boundaries):
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`sudo btrfs filesystem defragment -v -r {{path/to/directory}}`
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- Force syncing unwritten data blocks to disk(s):
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`sudo btrfs filesystem sync {{path/to/btrfs_mount}}`
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- Summarize disk usage for the files in a directory recursively:
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`sudo btrfs filesystem du --summarize {{path/to/directory}}`
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