Definition:
- Type
- Size
- Location
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Immutable flag:
- The immutable flag is an attribute of a file or directory that prevents it from being modified, even by the root user. In other words, no one can delete, rename, or write to an immutable file.
- The immutable flag is not set on all files. A single directory can have a mix of mutable and immutable files and subdirectories. Also, an immutable subdirectory can have mutable files.