Finally created an Oracle Linux 8.2 myself

I'm certainly not the first one to do a fresh Oracle Linux 8 installation. For instance the great Tim Hall already wrote about it. My setup is quite similar, apart from:

• I use 8.2 which is the latest-greatest at the moment.
  
• For my Vagrant projects I want a base box with the Server with GUI topology. So I used that, which was actually the default in the wizard.
• I use a NAT network adapter, for my Vagrant projects, so I skipped the network setting Tim Hall mentions.

Now, I use this as a base box for my Vagrant projects, and therefor I don't do this installation on a dayly basis. I have a Oracle Linux 7.7 box, and haven't had much problems with it.

However, I did had troubles with installing the Guest Additions this time. It didn't have the kernel-devel and kernel-header packages installed. Which is quite normal, so I did it using yum. However I kept getting the anoying mesasge that it couldn't get the 5.4.17-2011.5.3.el8uek.x86_64 version of the kernel headers. And the Guest Additions still wouldn't install. 

It kept me busy for some time, until I realized that by default it starts with the 5.4.x UEK kernel, while I it could install the kernel packages and headers for the 4.18.0.x  version.

So I found out how to startup with the correct kernel (correct in the sense that it is the kernel that allows me to use the GuestAdditions...). This can be done as follows:

sudo grubby --info=ALL

This lists the currently installed kernels. However, I found out that it is more convenient to check out the /boot folder:

sudo ls /boot//vmlinuz-*
/boot//vmlinuz-0-rescue-fddb3eeab19e4a928d6bfa04e0f91830
/boot//vmlinuz-4.18.0-193.14.3.el8_2.x86_64
/boot//vmlinuz-4.18.0-193.el8.x86_64
/boot//vmlinuz-5.4.17-2011.5.3.el8uek.x86_64

This merely because for setting the default kernel I need to provide the link to the image, also with a grubby command:

sudo grubby --set-default /boot/vmlinuz-4.18.0-193.14.3.el8_2.x86_64

Now, I can nicely install the necessary packages for the Guest Additions:

sudo dnf install kernel-devel kernel-headers gcc make perl

Next stop: boxing it into a Vagrant box.