On seg, 01 jan 2018, Richard Owlett wrote:
I need a tutorial. Man pages are unsatisfactory. Sort of like giving
someone a dictionary and expecting them to become competent writers.
The file/directory permission, and the chmod command to set them are
very old. Any book on Unix or Linux should cover them. I remember
O'Reilly had several good books, but I cannot recommend any specific one
right now.
As for chattr, the suggestion someone else made to forget about it by
now is a good one. First get a good understanding of the basic
permission system.