Question: how to install from aur?
Answer: Step 1: Get "Git Clone URL" Visit AUR: https://aur.archlinux.org/ and search a package: Go to the package page: Get "Git Clone URL": ... 
Step 2: Build The Package And Install It. git clone [the package] , cd [the package] , makepkg -si , and it's done! This is an example of a package called qperf.