pacman commands

some inaccuracies in the package manager section for pacman:  
install from file: 
`pacman -U [ package.tar.gz ]`   
while not completely incorrect, it should be:   
` pacman -U package.pkg.tar.zst`  ( or to a lesser extent: `.pkg.tar.xz` )   
   
update package lists:   
`pacman -S`   
should be:
`pacman -Sy`   
 