Cdtjkyj

I did a complete re-install (not upgrade) to Fedora 29 in November 2018. At that
time, a Fedora-29-compatible version of VirtualBox was not yet ready. Discussed
below the ========= line in this query are the steps that I took to (unsuccessfully)
attempt installing VirtualBox in Fedora 29 last November.

I am about to install VirtualBox in Fedora 29 by following the instructions in this link:
https://www.if-not-true-then-false.com/2010/install-virtualbox-with-yum-on-fedora-centos-red-hat-rhel/

What preliminary steps (if any) should I execute to first undo my unsuccessful
attempt?

=========================================================

For reference purposes, the attempt was documented by the following query:
Fedora 29 VirtualBox Installation Malfunction

Pertinent details from the above query follow:

1. cd /etc/yum.repos.d/


2. wget http://download.virtualbox.org/virtualbox/rpm/fedora/virtualbox.repo
   


3. Update latest packages and check your kernel version


4. dnf install binutils gcc make patch libgomp glibc-headers glibc-devel kernel-headers kernel-devel dkms


5. The above command triggered the following error msg:
   
   Failed to synchronize cache for repo 'virtualbox', ignoring this repo.


6. Ignoring the above error msg, I then executed:
   
   dnf install VirtualBox-5.2


7. The above command triggered the following msgs:
   
   Fedora 29 - x86_64 - VirtualBox
   
   
   Failed to synchronize cache for repo 'virtualbox', ignoring this repo.
   
   Last metadata expiration check: 0:05:45 ago on Sat 17 Nov 2018 03:40:42 PM PST.
   
   No match for argument: VirtualBox-5.2
   
   Error: Unable to find a match


8. Investigating, I then executed:
   
   cd /
   
   find -type f -iname "virtualbox.*"
   
   find -type f -iname "virtualbox*"
   
   


9. Results:
   
   ./var/cache/PackageKit/29/metadata/updates-29-x86_64/packages/virtualbox-guest-additions-5.2.20-1.fc29.x86_64.rpm
   
   ./var/cache/PackageKit/29/metadata/updates-29-x86_64/packages/virtualbox-guest-additions-5.2.22-1.fc29.x86_64.rpm


10. Per answer on corresponding query, given by Aaron D. Marasco, I then executed:
    
    Change $releasever to 28
    
    Re-attempt : dnf install VirtualBox-5.2


11. The result was several new error messages:
    
    conflicting requests - nothing provides libvpx.so.4()(64bit)
    
    needed by VirtualBox-5.2-5.2.0_118431_fedora26-1.x86_64.
    


12. Re-investigating today, 2-25-2019, I just executed
    
    cd /
    
    sudo find -type f -iname "virtualbox.*"
    
    sudo find -type f -iname "virtualbox*"


13. Ignoring *.png files, the results were:
    
    ./etc/yum.repos.d/virtualbox.repo
    
    ./var/cache/dnf/virtualbox.solv
    
    ./var/cache/dnf/virtualbox.solv
    
    ./var/cache/dnf/virtualbox-filenames.solvx


14. Just to emphasize, the following files are no longer present:
    
    ./var/cache/PackageKit/29/metadata/updates-29-x86_64/packages/virtualbox-guest-additions-5.2.20-1.fc29.x86_64.rpm
    
    ./var/cache/PackageKit/29/metadata/updates-29-x86_64/packages/virtualbox-guest-additions-5.2.22-1.fc29.x86_64.rpm