I cannot hook an ethernet cable to a router because the router is using all the plugs. What is a backup to make a Lemmy instance with Yunohost? If there’s no other way, what else can I use?
I have a USB stick with 32GB. However, I cannot hook an ethernet cable to the computer and router because all the router’s plugs are being used.
You should be able to plug a small switch into the router and then you'll have more ports available. I'd suggest 1gb or faster, depending on the speed limitations of the ports on the router you could go for a faster switch if you think you'd need it.
If my grandfather were still alive and tried to tell me literally anything about network maintenance, I’d say “ok sure grandpa, don’t worry about it”, and then do it anyways after he goes to bed, because I know how networking works as a component of having over a decade of devops and homelab experience, and he would never notice.