Jon Harsem wrote in today with a link to a cool IRIX "cheat sheet" containing loads of commands and tips for working with IRIX, apparently written by SGI engineers. You can check it out here: Helpful Commands in IRIX. There's tons of great info in there; print it out and keep it near your machine!
I also noticed a similar document covering the vi editor which looks to be equally useful: Tricks and Fun With vi.
