 Some time ago I made a video cut cut cut about my cut bytes tool Here is the help and one thing it already could do but I hadn't documented it in the man page And I don't think I had explained it is that cut bytes also accept here files And you can see here the hash indicator and that indicates that cut bytes accept here files So here file is a file where you you don't actually get the content From the disk, but the content is literally given in the argument So let's demo this cut bytes. I Will take everything and that's the cut expression And now I start my here document with a hash Now here on OS X. I need to escape this Character because it has special meaning and now let me type in 41 42 43 44 45 46 47 48 49 like this and when I do this the output is actually the sequence that I gave Now this can also be interpreted as hexadecimal code like this a Hush to indicate a here document and then an H and then hush to indicate that it is actually hex hexadecimal and now it is interpreted as hexadecimal uppercase letters a b c d e f j h hi and Of course, I can cut into that Say select the first two. So that's here documents Literal hexadecimal or you can also give basic st for it's all explained explained in the man page