Hello Dennis,

If it doesn't make your cheatsheet too verbose, I would highly recommend
adding in |, >, and <. I use them very often, and they open up a lot of
options for a user.

It may be going a little beyond the basics, but sed and awk are also really
handy to keep in mind for altering files and streams. I think that they can
do a lot of work most people assume they can't do or would have to write a
program for.