If you need help in any programming language or OS. You just have to visit http://www.stackoverflow.com and post a question. But before you post you should know that your question is highly likely asked by someone before you. The exisiting number of responses in this site is huge.
This site was created by Jeff Atwood and Joel Spolsky in 2008. This web is a question answers kind wich belongs to the Stack Exchange Network. The group is also huge you can find there any topic you ever think about it existence.
Unfortunately the software to make Questions And Answers sites like StackOverFlow is owned by his creators and not available by the comunity.
The rest is open for all. I think is a must have in our bookmarks. Hope you enjoy it.