Apt-get install
apt-get update
apt-get remove
apt-get dist-upgrade
apt-get purge
Fedora/RHEL/CentOS
yum install
yum update
yum remove
Opensuse
yast2 --install
yast2 --remove
zypper update
Freebsd
pkg_add
pkg_delete
Gentoo
emerge package # Install
emerge -C package # Remove a package
emerge -s keyword # Search for packages (package names only)
emerge -u package # update the package
Arch
pacman -U package.pkg.tar.xz # Local package install
pacman -Syy # Refresh package databases
pacman -Syu # Update installed packages
pacman -S package # Install package
pacman -R package # Remove package