Here are some free real computer science courses from Stanford, Harvard, and lots of top ranked universities. I am currently taking CS101 at Stanford. There is also an intro to Linux course coming up that normally costs $2400 on Linux.com. This same course is being offered for the first time on EDX.org for free. Check it out.
Coursera= https://www.coursera.org/courses?orderby=upcoming&search=computer science
EDX= https://www.edx.org/course/linuxfoundationx/linuxfoundationx-lfs101x-introduction-1621#.U1Fvp5UnKM8
There are also some other ones like Udemy
Udemy= https://www.udemy.com/courses/search/?q=php&view=grid&price=free
