Update cheatsheets

linux/chattr

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+---
+syntax: markdown
+tags: [tldr, linux]
+source: https://github.com/tldr-pages/tldr.git
+---
+# chattr
+
+> Change attributes of files or directories.
+> More information: <https://manned.org/chattr>.
+
+- Make a file or directory immutable to changes and deletion, even by superuser:
+
+`chattr +i {{path/to/file_or_directory}}`
+
+- Make a file or directory mutable:
+
+`chattr -i {{path/to/file_or_directory}}`
+
+- Recursively make an entire directory and contents immutable:
+
+`chattr -R +i {{path/to/directory}}`