In my current use case I'm setting up a new Ubuntu server for hosting LLMs. I didn't take notes when setting it up last time around but want to document exactly what was required to pass on to coworkers trying something similar. I don't know what packages I installed to get the minimalist setup working vs what is installed by default. I'm tempted to nuke and redo with notes but I'm sure there is a better method of tracking down what I deployed to get to the current state.

...or not, and this is why HomeBrew exists and I need to learn it or ansible/etc.

NixOS seems ideal for this.