Update cheatsheets

linux/btrfs-rescue

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+---
+syntax: markdown
+tags: [tldr, linux]
+source: https://github.com/tldr-pages/tldr.git
+---
+# btrfs rescue
+
+> Try to recover a damaged btrfs filesystem.
+> More information: <https://btrfs.readthedocs.io/en/latest/btrfs-rescue.html>.
+
+- Rebuild the filesystem metadata tree (very slow):
+
+`sudo btrfs rescue chunk-recover {{path/to/partition}}`
+
+- Fix device size alignment related problems (e.g. unable to mount the filesystem with super total bytes mismatch):
+
+`sudo btrfs rescue fix-device-size {{path/to/partition}}`
+
+- Recover a corrupted superblock from correct copies (recover the root of filesystem tree):
+
+`sudo btrfs rescue super-recover {{path/to/partition}}`
+
+- Recover from an interrupted transactions (fixes log replay problems):
+
+`sudo btrfs rescue zero-log {{path/to/partition}}`
+
+- Create a `/dev/btrfs-control` control device when `mknod` is not installed:
+
+`sudo btrfs rescue create-control-device`