In the category of small commands, we also have cat and tag.
Let's talk about it. Cat has some nice options to show you.
Text files minus uppercase H shows all non printable characters.
And B is giving line numbers.
And N is doing the same, but not for empty lines.
And S can be used to suppress repeated empty lines.
Tag, in fact, is not the most useful utility. It's like cat, but in the reverse order.
So let me show you.
So when I use cat on regex, then I'm just seeing the content of this regex file.
And what else did we have? Hey, LS LRT
demofeld. That was a masterwork of art, right?
So let me use Cat A on demofell.
And what do we see? We see these dollars. The dollar is every time that we used enter.
So what else can we do? Well, we use cat on regex.
You can also use tack on regex.
And what do we see? It's the reverse content of the regexval. Does that make sense? No, not at all.
It more sounds like an exercise in an introduction to C programming course.
But it's here. And sometimes on Linux you have commands and utilities that
were created just because the developer thought it was fun to create them.