I mean, you can do that with any image. Adding the exclamation point before the link tells Lemmy to embed the image instead. And anything you put in the brackets turns into alt text, which users can view by hovering over the image.
My point was mostly to be able to add it to my discord server (or anywhere that allows custom emojiās, really.) Since they use a standardized 128x128 image size, itās just a matter of scaling it down to that and trimming it so itās transparent.
There's a massive number of security holes in bash, shellshock being the most egregious. bash has some really terrible design flaws, especially parsing $var multiple times so you can't reliably break on spaces. Almost any other shell is safer and more productive.