Update README

README.md

@@ -17,7 +17,13 @@ In this project, you can build your own C++ application or extend this Snake gam
   * Windows: [Click here for installation instructions](http://gnuwin32.sourceforge.net/packages/make.htm)
 * SDL2 >= 2.0
   * All installation instructions can be found [here](https://wiki.libsdl.org/Installation)
-  * Note that for Linux, an `apt` or `apt-get` installation is preferred to building from source.
+  * Note that for Linux, an `apt` or `apt-get` installation is preferred to building from source. For example:
+  ```bash
+  # Debian-based systems
+  sudo apt-get install libsdl2-dev
+  # Red-hat systems   
+  sudo yum install SDL2-devel
+  ```
 * gcc/g++ >= 5.4
   * Linux: gcc / g++ is installed by default on most Linux distros
   * Mac: same deal as make - [install Xcode command line tools](https://developer.apple.com/xcode/features/)