YUM extender, or yumex for short, is a frontend to the yum and dnf utilities. Be 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-dnfLast metadata expiration check: 0:01:38 ago on Thu 02 Aug 2018 10:30:42 AM EDT.Dependencies resolved.==========================================================================================================================Package                              Arch           Version                                        Repository       Size==========================================================================================================================Installing:dnfdragora                           noarch         1.0.1-10.git20180108.b0e8a66.fc28         fedora          364 kInstalling dependencies:

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