I doubt that Terminal can accomplish anything that Activity Monitor couldn't, but I guess it can't hurt to try.
It looks like it's time to reset NVRAM as per your linked doc, though. (The doc sounds ominous, but I've never run into any problems after the many times I"ve done it.)
The new Great Equalizer is the SEND button.
In Memory of Harv: Those who can make you believe absurdities can make you commit atrocities. ~Voltaire
