Introduction to Linux is a edX Course (follow the link)

School: LinuxFoundationX
Course Code: LFS101x
Classes Start: 1 Aug 2014
Estimated effort: Most users will find that thoroughly covering the material will take anywhere from 40 to 60 hours

Develop a good working knowledge of Linux using both the graphical interface and command line, covering the major Linux distribution families.

About this Course

Linux powers 94% of the world’s supercomputers, most of the servers powering the Internet, the majority of financial trades worldwide and a billion Android devices. In short, Linux is everywhere. It appears in many different architectures, from mainframes to server to desktop to mobile and on a staggeringly wide variety of hardware.

This course explores the various tools and techniques commonly used by Linux programmers, system administrators and end users to achieve their day-to-day work in a Linux environment. It is designed for experienced computer users who have limited or no previous exposure to Linux, whether they are working in an individual or Enterprise environment.

Upon completion of this training you should have a good working knowledge of Linux, from both a graphical and command line perspective, allowing you to easily navigate through any of the major Linux distributions. You will be able to continue your progress as either a user, system administrator or developer using the acquired skill set.