btop for sure. Shows current processes and their resources usage, us can terminate and kill them from the program kinda like windoes task manager, shows CPU usage/temp, and ram, storage, and network use. Only big thing it doesnt have that I use is GPU monitoring, I use nvtop for that.

For stress testing, mprime is def best for CPU stress test. You may know it as prime95 on windows.

Looks to me like they are just censoring any instance of their username, possibly because it contains their real name.

Edit: also device name