Important Links

1.Linux and Networing Lectuer iit kanpur link
http://home.iitk.ac.in/~navi/sidbilinuxcourse/
http://home.iitk.ac.in/~navi/sidbinetworkcourse/

2.Interview question on Database and others
http://placementpapers.net/helpingroot/Database/Databases-Most-Important-Questions-2
http://www.techpreparation.com/computer-interview-questions/
3.link for os lecture
http://www.csee.usf.edu/~anda/cop4600/lectures/