Why did I choose the handle "lsattr_nix"?
The "lsattr" command displays the attributes of Linux files EXT2.
Linux files that have the flag set for "Immutable" can not be modified or deleted, even by "root" unless the flag is removed.
The immutable attribute can be identified using "lsattr".
If "i" is the out put for the attribute listing of a file it is unchangeable or immutable. See the picture above for an example.
Enjoy!