I think some distros disable using RSA by default. Might need to use it explicitly.

I don’t know if it’s that cut and dry. If you study a Operative Systems class or buy a book about them, it’ll exclusively deal with the kernel.

Are reading what you write? It’s linux so it isn’t?

Yeah, they’re mostly bits of hardware that turn ttl/serial into a USB device. Then you can use minicom or dterm to connect to the host. Mostly used for embedded development, but also useful for debugging servers that are not connecting to the network without having to lug a keyboard and screen.

After they’re connected, if they speak vt110, your terminal emulator can display everything properly