War ? zypper - package manager used on OpenSuse (and also available for Sailfish OS) apt-get - package manager on Debian yum - package manager currently used on RHEL<=7 and Fedora <22 dnf - yum replacement (#unlike yum has sane refactored codebase and works with Python 3) Also note that package manager is something else than the packaging forma - zypper, yum and dnf work on top of RPM packages while apt-get works on top of dpkg/deb packages.