bug#10366: hello, i have a problem when i use chmod, can u explan why?thks

[ilusionoflife]

On Sunday 25 December 2011 22:51:21 lidong_bit wrote:
> in /var/, i have a directory:www, its property is:
> d-w-------  2 root root  4096 2011-12-26 01:24 www
> i want to change the property so that all the user have the write
> authority: 1.
> address@hidden:/var$ sudo chmod a +w -R ./www/
> chmod: invalid mode: `a'
> Try `chmod --help' for more information.
> address@hidden:/var$
> 
> 2.
> address@hidden:/var$ sudo chmod o +w -R ./www/
> chmod: invalid mode: `o'
> Try `chmod --help' for more information.
> address@hidden:/var$
> 
> 
> I don't why this happens, is it a buy? or is it forbidden?
You are not allowed to use space between first letter and plus sign. 
I am not specialist to say if this behavior comforms to any standarts.