Cygwin介绍

some useful links：

http://www.cygwin.cn/site/install/

http://blog.csdn.net/yunfeitian/archive/2005/04/20/356214.aspx

http://hi.baidu.com/dreamsboy/blog/item/ca4109d75fc865dda044df02.html

http://soyuz.acs.uwinnipeg.ca/~abrodsky/2906/cygwin.html

http://cygwin.com/cygwin-ug-net/highlights.html

can search "cygwin.iso" or "cygwin dvd" to download a imae