# dnf install https://dl.fedoraproject.org/pub/epel/epel-release-latest-8.noarch.rpm
# dnf install https://download1.rpmfusion.org/free/el/rpmfusion-free-release-8.noarch.rpm#To see current repos
yum repolist
#To see the package info in repo
yum info <package name>
#to see locally installed info comparison
rpm -qi <package name>
# to remove a single package
yum remove
# to remove a package with dependencies
yum autoremove <pkg>