Distro	Update System	Install Package	Is package already installed?	List all installed packages	List all available packages. (All packages in the packaging system.)	Add new repository	What files does a package provide?	What package does file X belong to?	How do I verify my package database is not corrupt?	How do I download but not install a package	How can I take apart a package to see what's inside?		How do I build my own package?
Gentoo	emerge --sync && emerge -uDv world
Arch	pacman -Syu
Fedora	yum update
RHEL	yum update
Ubuntu	apt-get update
Debian
UnityLinux	smart update