YUM extender, or yumex for short, is a frontend to the yum and dnf utilities. By default, yumex does not come preinstalled with Fedora 28. This can easily be addressed by installing the yumex utility at the shell:
[root@localhost philip]# dnf install yumex-dnf
Last metadata expiration check: 0:01:38 ago on Thu 02 Aug 2018 10:30:42 AM EDT.
Dependencies resolved.
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Package Arch Version Repository Size
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Installing:
dnfdragora noarch 1.0.1-10.git20180108.b0e8a66.fc28 fedora 364 k
Installing dependencies:
checkpolicy...
