chattr
Change attributes of files or directories.
- 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}
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