# The EPEL repository can be added to RHEL 9 with the following command:

sudo dnf install https://dl.fedoraproject.org/pub/epel/epel-release-latest-9.noarch.rpm

# Install RPM Fusion Repository in Linux

sudo dnf install --nogpgcheck https://mirrors.rpmfusion.org/free/el/rpmfusion-free-release-$(rpm -E %rhel).noarch.rpm https://mirrors.rpmfusion.org/nonfree/el/rpmfusion-nonfree-release-$(rpm -E %rhel).noarch.rpm

# RHEL users might be required to execute the following additional step:
sudo subscription-manager repos --enable codeready-builder-for-rhel-9-$(arch)-rpms

# Verify RPM Fusion Repository in Linux
sudo dnf upgrade
dnf repolist

# Now list free and nonfree package lists of rpm fusion:
dnf repository-packages rpmfusion-free-updates list
dnf repository-packages rpmfusion-nonfree-updates list

# Enable repositories:
sudo dnf config-manager --set-enabled <repo name>