Grammar and style fixes in the netstat section
netstat is deprecated in favor of ss, which I didn't realize until now. Switched the whole netstat section to ss, and as requested by @miketheman, expounded a bit more on the options.
Add an example output for iftop and discuss availibility of the tool
Reword the section on network engineers and systems admins working together to have more empathy and less us vs them
Expound on the merits of ping and telnet as troubleshoot tools.