Did you ever had trouble with Network Manager and felt that you need to try to setup DHCP or static IP address from command Line in Linux? I once accidentally removed Gnome (my bad, wasn’t paying attention and did an apt-get autoremove -y .. how bad is that.. ) So I was stuck, I couldn’t connect to Internet to reinstall my Gnome Network Manager because I’m in TEXT mode network-manager was broken. I learned a good lesson. you need internet for almost anything these days unless you’ve memorized all those manual command.