Also, tip, pretty sure that in the default web interface there is a toggle to deactivate bot posts. These bots are often just reposting what is on Reddit to try to stuff lemmy with content, but I tend to leave them deactivated. Also, never forget that the best thing after staying in a pit like this, is to touch a bit of grass ;P
I’d also keep DNS, DHCP and routing software,detailed manuals about how IPV4 and 6 work, nginx and maybe Wordpress, lemmy, Peertube, and other federated software