https://www.reddit.com/r/plaintextaccounting/comments/1cy7fbq/command_cheat_sheet/
Is there a cheat sheet for the commands?
The known ones are here: Plain Text Accounting (PTA) - plaintextaccounting.org
..and all but one focus on file format only, not the CLI. More/better cheat sheets is a very good idea.
You'll find the core commands are similar between ledger and hledger, and totally different in beancount. I am absolutely in need of a CLI cheat sheet for beancount, personally.
Some cheatsheet-like things available at the CLI:
ledger -h
hledger
hledger -h
hledger CMD -h
tldr ledger
tldr hledger
The tldr pages (1, 2) need some love. Eg some of the example commands don't work (ledger commands 2 and 3).