At my first "real" job I used to work on a RS-6000, a couple hundred-grand machine. The admin wouldn't install _anything_ non-stock other than a JVM on it. It t

At my first "real" job I used to work on a RS-6000, a couple hundred-grand machine. The admin wouldn't install _anything_ non-stock other than a JVM on it. It taught me how to get around using only BSD Unix tools and Bourne Shell. It was an enormous pain in the butt, but what I learned has been utterly invaluable over the course of my career.