[H-GEN] Re: [Linux-SA] file permisions (fwd)
The Fuzzy One
s335810 at student.uq.edu.au
Wed Feb 11 20:36:37 EST 1998
On Thu, 12 Feb 1998, Andrae Muys wrote:
> Now convert each of the 4 triplets into a octal number
> sst rwx rwx rwx
> 7 7 7 7
Everything that Andrae said is good and valid, but not being and
engineer, I prefer to think about it a little differently for my own
recollection.
Firstly, you hardly ever have to worry about sst for normal files
:) So I ignore that part. If I do need it, I just use the old +/-
notation. So for you average file you've got a three digit number
eg 664, or 666
The first digit is your permisions.
The second digit is group permissions.
The third digit is everyone else's permissions.
executable = 1 (2^0)
writable = 2 (2^1)
readable = 4 (2^2)
So just add up the permissions you want for each digit, and go :)
You don't have to worry that you're in octal, because you cant get more
than 7 by adding those digits up anyway ;)
fuzzy BSc.
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