The University of Technology Sydney wrote a similar training program inside a VM to use in their systems introduction classes called LinuxGym [0]. Its a surpris

The University of Technology Sydney wrote a similar training program inside a VM to use in their systems introduction classes called LinuxGym [0]. Its a surprisingly useful learning tool if a little basic and dated, but covers everything from directories to grep to awk. [0] - http://linuxgym.it.uts.edu.au/linuxgym/lgwww/ http://linuxgym.it.uts.edu.au/linuxgym/lgwww/