linuxmaillists@xxxxxxxxxxx wrote:
On Thursday 08 February 2007 09:29, edwardspl@xxxxxxxxxx
wrote:
Les Mikesell wrote:
edwardspl@xxxxxxxxxx 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.
Hello,
So...Do you know the following ( convert to the no format) ?
1, chmod g+rwx ( What number of g+rwx, eg : ?77 ) /home/edward
2, chmod +t ( What number of +t ) /home/edward
Edward.
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