linuxmaillists(a)charter.net wrote:
On Thursday 08 February 2007 09:29, edwardspl(a)ita.org.mo
wrote:
>Les Mikesell wrote:
>
>
>>edwardspl(a)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.
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.