[Fwd: User account ( hacked ) of FC6 System]

[linuxmaillists at charter.net]

On Thursday 08 February 2007 09:29, edwardspl at ita.org.mo 
wrote:
> Les Mikesell wrote:
> >edwardspl at ita.org.mo wrote:
> >>>>chmod g+rwx ( What number of g+rwx, eg : ?77 )
> >>>> /home/edward
> >>>
> >>>You can use the symbolic form literally. I think it's
> >>> easier to understand. Let the computer do the
> >>> binary/octal math. g+rwx means add the read, write,
> >>> and execute bits for the group.
> >>
> >>But I want to know what no of g+rwx...
> >
> >The + means it is added to the bits already permitted. 
> > Look at them as groups of 3 bits in binary and take the
> > octal value.
> >
> > user   group    other
> > rwx    rwx     rwx
> >
> >You'll start with a home dir having rwx --- ---  so
> > that's 111 000 000 binary or 700 octal.
> >Add  the group rwx and you get 111 111 000 or 770 octal
>
> So, g+rwx = 770, right ?
>
> >>>>chmod +t ( What number of +t ) /home/edward
> >
> >That's one more bit to the left, 1 000 000 000  binary,
> > so 1000 octal. Add that to what you have.
> >
> >>>Same here, you can type it that way and it means add
> >>> the "sticky" bit.
> >>
> >>Also want to know...
> >
> >Altogether, the octal value for the mode ends up at
> > 1770.  But, as I said before the computer does a better
> > job of thinking in octal.
>
> So, +t = 1770, right ?
>
> Edward.

When I first started learning how to write the permissions 
setting RWX I could not figure out how to do it using the 
letters.  I found it very easy to understand doing it with 
the numbers.  I type it like this chmod 777 <file> to get 
the rwxrwxrwx and if I want to change it to rwxr-xr-x I 
just type chmod 755 <file> and if I want rwx------ I type 
chmod 700 <file>.  I am sure I can figure out how to write 
it with the letters now but I think it is much easier to 
use the numbers.