Which package management tool is used in Red Hat-based Linux Systems?

Portage is the source-based package management system used exclusively by Gentoo Linux.

RPM (Red Hat Package Manager) is the native package format and management tool for Red Hat-based distributions including RHEL, CentOS, Fedora, and derivatives. It handles installation, querying, verification, and removal of .rpm packages. Higher-level tools like yum and dnf also rely on RPM as their underlying package backend.

apt-get is the package management tool used by Debian-based distributions such as Ubuntu and Debian itself.

dpkg is the low-level package tool for Debian-based systems and handles .deb packages, not .rpm packages.

packagectl is not a real or recognized Linux package management tool.