showkey

v 1.9 Updated: 6 months, 3 weeks ago

echo raw keystrokes back at you in a printable form

This program puts your terminal in raw mode, eats keystrokes, and prints them back it you in a recognizable printed form (using <>-surrounded ASCII mnemonics for non-printables). This may be useful, for example, if you're not certain what your keyboard keys are sending.

http://catb.org/esr/showkey/

To install showkey, paste this in macOS terminal after installing MacPorts

sudo port install showkey

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