tac is a fairly simple command, straight out of coreutils, that does almost everything you would expect it to.
And with that one simple screenshot, not only do you know exactly what
tac does, but why it has that name and what the joke is.
tac does pretty much everything cat does, with some very small omissions. For example, if you ever find yourself relying on
cat -n to see line number counts, you won’t get that with
Then again, I can only imagine a few isolated circumstances where that might be useful. 😕
Having said that, I find myself running out of things to say about
tac. Unless of course, you find
tac test.txt | rev | tac | rev somehow amusing. 🙄