Arch Linux

First port of call: https://wiki.archlinux.org/

Pacman

-S <package> Install package
-Suy Sync and do full upgrade
-Sc Remove cached files - do before upgrade
-Qq List packages (without versions)
-Rs Remove package and dependancies
# Equivalent of apt-get auto-remove
$ pacman -R $(packman -Qtdg)

https://wiki.archlinux.org/index.php/pacman

Grub

# Generate grub config
$ sudo grub-mkconfig -o /boot/grub/grub.cnf

https://wiki.archlinux.org/index.php/Grub