Tanks for the url. but there are only tutorial for the begineres. i know the c++, but now i am looking for some website of manuals, tutorials for advanced programmaing in linux, i need to create a daemon service, i need to know how i can keep the control of linux: for example lock the os linux, responce to interrupts, and soma like those tinks, I am sorry for ma poor english. __________________________________________________ Do You Yahoo!? Kick off your party with Yahoo! Invites. http://invites.yahoo.com/ - : send the line "unsubscribe linux-net" in the body of a message to majordomo@vger.rutgers.edu