hello people daniweb....just want to ask honest oppinions from you guys, because this has been bugging me for years. I've been a PHP developer for 5 year using windows. So far so good. i am able to accomplish the task at hand. but there's always back of my head saying, that i suck because i had zero knowledge on Unix or Linux. Is that ok? or do i really need to learn the unix/linux system to be able to call myself good programmer?