One of the most useful cheat sheet utilities I've come across is cheat.sh: https://github.com/chubin/cheat.sh

If you don't have it installed it can easily be queried with curl from the command line like: `curl cheat.sh/sed`. The payload is colorized and gives a lot of examples of usage of the command. You can also query "cht.sh" to use fewer characters. There is actually a lot more advanced usage of the tool/service if you check out the README.

Apologies if this isn't what you're looking for.