For getting around linux I've found no better helpers than manpages and the cheatsheets by Peteris Krumins[1]. I notice this isn't offered as a pdf or image, is the idea that someone will come and visit the site when their server is in trouble? That said, I didn't know about some stuff here like scriptreplay -- thanks!
I'd second a quick pdf version of it as well, I'm sure more than a few of us have a directory with cheatsheets in somewhere on their drive as a 'just in case'.
Note: not affialated with them; just one of the top Google results. Also, I'd take a screenshot (and then export to pdf if an image file wasn't acceptable) since the pdf conversion via pdfcrowd splits it into multiple pages.
[1]: http://www.catonmat.net/projects/cheat-sheets/