Some pacman commands noted down from @LukeSmithxyz's video

pacman_cmds.sh

sudo pacman -Syu            # Sy: apt-get update & Su: apt-get upgrade
sudo pacman -Rns $program   # s: remove dependencies & n: remove root config files
$cmd | wc -l                # wordcount by lines
pacman -Qe                  # query installed programs by you or programs you installed
pacman -Qeq                 # same without version number, could also apply to other things
# /etc/pacman.conf          # configuration location
# Color                       # colours in pacman output
# VerbosePkgLists             # detailed listing
# ILoveCandy                  # pacman instead of loading
# /etc/pacman.d/mirrorlist  # mirror list
sudo pacman -Sc             # clear cache

.sh extension is so that comments get a different colour.