I understand that you are posting the article to help people, but the point others in this thread are trying to make is that when somebody writes something, it is copyrighted by law. That means you can't just grab anything you see and post it on your site without permission. It's not legal.

If you e-mail the webmaster where you got the guide from, he may give you permission to post it or he might ask you to simply post a link to his site. But you shouldn't just take other people's work and post it on your site without their permission.

BTW - If a copyright notice is not posted, it is still copyrighted. The notice is optional and doesn't change anything.