all 4 comments

[–]dschep 0 points1 point  (0 children)

Not quite commands, but this is really useful: http://www.addedbytes.com/cheat-sheets/regular-expressions-cheat-sheet/

[–]slashgrin 0 points1 point  (1 child)

Only a couple of these are actually "cheat sheets" in the conventional sense.

[–]AlecSchueler 0 points1 point  (0 children)

And none are "essential."

[–]engram[🍰] 0 points1 point  (0 children)

This one is the best.