Add direct links to student material pdfs

README.md

 This is a public repository that contains a collection of our current (and past) LinuxDays courses.
 
-# For Course Attendants
+# Downloading the course material
 
-If you are a course attendant, you can clone (download) this repository by issuing the following command in a terminal:
+Our course material (slides and several guides) are available as PDFs:
+
+- [Free and Open Source Software](https://gitlab.ethz.ch/thealternative/courses/blob/master/FOSS_course/slides.pdf)
+- [Introduction to Linux](https://gitlab.ethz.ch/thealternative/courses/blob/master/intro_course/slides.pdf)
+- [Console Toolkit Part 1](https://gitlab.ethz.ch/thealternative/courses/blob/master/console_toolkit/console_toolkit_1.pdf)
+- [Console Toolkit Part 1&2](https://gitlab.ethz.ch/thealternative/courses/blob/master/console_toolkit/console_toolkit_2.pdf)
+- [Console Toolkit Exercises](https://gitlab.ethz.ch/thealternative/courses/blob/master/console_toolkit/exercise_files/exercises.pdf)
+- [Bash Course (Slides)](https://gitlab.ethz.ch/thealternative/courses/blob/master/bash_course/pres/pres.pdf)
+- [Bash Course (Guide)](https://gitlab.ethz.ch/thealternative/courses/blob/master/bash_course/guide/guide.pdf)
+- [Bash Course Exercises](https://gitlab.ethz.ch/thealternative/courses/blob/master/bash_course/exercisesheet/sheet.pdf) and [Solutions](https://gitlab.ethz.ch/thealternative/courses/blob/master/bash_course/exercisesheet/sheet.pdf)
+
+
+# Cloning the repository
+
+To download this repository, please install [git-lfs](https://git-lfs.github.com/). You can clone (download) this entire repository by issuing the following command in a terminal:
 
 ```
+git-lfs install
 git clone https://gitlab.ethz.ch/thealternative/courses.git
 ```