folder permission help

[Knute Johnson]

On 10/2/2011 9:20 PM, Craig White wrote:
> On Sun, 2011-10-02 at 20:22 -0700, Rajeev Prasad wrote:
>> Hi,
>>
>> please help understand what this means and how can folder be set to permissions like below:
>>
>> drwxrwsr-x  2 user1 www-pub 4096 2011-10-02 05:34 data_folder
> ----
> chmod 2775 data_folder
         ^

What does the 2 mean?

Thanks,

-- 

Knute Johnson