A few years back while working as a Linux admin I sent this to a newish co-worker who was struggling. They were an older Windows/DOS person and had little familiarity with UNIX. I thought this would be an easy way to practice completing tasks via shell and to demonstrate the possibility therein. I checked in a few weeks later and my co-worker never went past looking at the first page and saying 'This looks neat' - unsurprisingly they were let go about two months after I left.