Update cheatsheets

linux/btrfs-restore

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+---
+syntax: markdown
+tags: [tldr, linux]
+source: https://github.com/tldr-pages/tldr.git
+---
+# btrfs restore
+
+> Try to salvage files from a damaged btrfs filesystem.
+> More information: <https://btrfs.readthedocs.io/en/latest/btrfs-restore.html>.
+
+- Restore all files from a btrfs filesystem to a given directory:
+
+`sudo btrfs restore {{path/to/btrfs_device}} {{path/to/target_directory}}`
+
+- List (don't write) files to be restored from a btrfs filesystem:
+
+`sudo btrfs restore --dry-run {{path/to/btrfs_device}} {{path/to/target_directory}}`
+
+- Restore files matching a given regex ([c]ase-insensitive) files to be restored from a btrfs filesystem (all parent directories of target file(s) must match as well):
+
+`sudo btrfs restore --path-regex {{regex}} -c {{path/to/btrfs_device}} {{path/to/target_directory}}`
+
+- Restore files from a btrfs filesystem using a specific root tree `bytenr` (see `btrfs-find-root`):
+
+`sudo btrfs restore -t {{bytenr}} {{path/to/btrfs_device}} {{path/to/target_directory}}`
+
+- Restore files from a btrfs filesystem (along with metadata, extended attributes, and Symlinks), overwriting files in the target:
+
+`sudo btrfs restore --metadata --xattr --symlinks --overwrite {{path/to/btrfs_device}} {{path/to/target_directory}}`