Usage disk and rosclean

@MeineLiebeAxt ,

Actually, installing Anaconda IDE will make changes to your .bashrc file and the environment.
Therefore, you were unable to perform catkin_make.
While installing Anaconda, if it asked you for conda init and you selected “yes”, then your python environment variables to start ROS will fail.
This is a known fact discussed in the ROS discourse.

http://wiki.ros.org/IDEs#Anaconda

– Girish