I got tired of googling the same flag every time.
I spend most of my working life in a terminal — managing systems, deploying infrastructure, troubleshooting things at 2am that were fine yesterday. And no matter how many years of experience you have, there's always some command whose exact flag order you can never quite remember: was it -A 3 or -B 3? Does apply or create come first? Which iptables chain do I actually need?
The reference material out there for this stuff is scattered everywhere — half-finished blog posts, forum answers from 2014, official docs that are technically complete but take five minutes to find the one line you need. I got tired of keeping a dozen browser tabs open just to remember syntax I'd already looked up a hundred times before.
So I started building the reference sheets I actually wanted for myself: dense, accurate, organized by what you're trying to do rather than alphabetical order, and laid out so you can find the answer in three seconds instead of scrolling through a man page. No fluff, no ads, no "10 tips you won't believe" — just the commands, what they do, and enough context to use them correctly.
Terminal Reference Co. is that project turned into something I can share. Every sheet is built from real, hands-on experience with these tools — not scraped or generated from a list I didn't understand. If it's in one of these PDFs, it's because I've actually needed it myself.
Whether you're a sysadmin, a DevOps engineer, a student studying for a cert, or just someone who wants their most-used commands off Google and onto one page — that's who I built these for.