Re: File permission confusion [Debian 9.1 with MATE]

[Richard Owlett <rowlett@cloud85.net>]

On 01/01/2018 12:32 PM, Thomas Schmitt wrote:
> Hi,
>
> Richard Owlett
> > I used "linux tutorial chmod chattr" [w/o quotes] in both DuckDuckGo
> > and Google.
>
> A general search topic would be "linux file permissions" and "chattr".

I did a DuckDuckGo search adding "tutorial" and got what I had been 
aiming at with my original searches. Thanks.

> I can show you an example shell session on an ext4 filesystem.
>
> I create a directory with a file and take away w-permissions:
>
>   $ cd /home/thomas/test
>   $ mkdir my_private_dir
>   $ echo private_content >my_private_dir/my_private_file
>   $ chmod a-w my_private_dir/my_private_file
>   $ chmod a-w my_private_dir
>
> Now normal users including myelf cannot change the file content and
> cannot rename or remove the file

That is my goal. I think doing all but the last step, examining the 
result, doing the last step, examining that result, and examining the 
differences will be educational. I suspect there is an AHAAA moment in 
my future :}

I've not yet gone deeply enough in the material I've been given.
I believe I have a homework assignment. Retirement does create 
opportunities.

> [snipping prior to futher study study]
>
> I can of course not comment on what particular GUI tools do when they
> promise the user to make something "Read-only".
> (... or what systemd is willing to do for its clients ....)

Understood. You might add "How it will be interpreted by a Windows 
refugee :/
Thanks again.

> Have a nice day :)
>
> Thomas