strange directory problem

[Kelvin Cheung]

hello,erverbody.
I met a strange problem. When creat a directory with all letters 
capitalized, the system will turn it into all small letters.

[root at localhost doc]# mkdir DOC
[root at localhost doc]# ls
doc

This often make mistakes when I compile programs. 
Please help me, thanks very much.

_________________________________________________________________
享用世界上最大的电子邮件系统― MSN Hotmail。  http://www.hotmail.com