Some basic commands to use with Pacman (Arch package manager)
# Search packages
$ pacman -sS package
# Install package or upgrade
$ pacman -S package
# Remove package
$ pacman -R package
# Remove package and all dependencies
$ pacman -Rcd package
# Update mirrors
$ pacman -Syy
# Full system upgrade
$ pacman -Su
$ pacman -Syu # With sync included