Do you want to find out how to perform everyday activities using Linux operating system? Learn about commonly used applications and utilities? Then register to take Introduction to Linux course created by The Linux Foundation. It will take anywhere from 40 to 60 hours to complete the course and accustom yourself to Linux.
Take a note that this quite popular course has over one hundred thousand registrations, is completely free and starts on 1st August 2014.
If you want something more then look at the courses promoted by IBM as part of the 50th anniversary of the mainframe computer at IBM Academic Initiative website.
Those courses focus mainly on enterprise computing and are free too - An Introduction to Enterprise Computing from Marist College which will begin on 15th May 2014 and Enterprise Computing Strategies from Syracuse University which will begin on 1st September 2014.
Take advantage of this opportunity and expand your skills and interests.