Running Oracle Linux inside VirtualBox: Installation Virtualbox guest additions

First you have to insert the Virtualbox Guest Additions iso-image:

 

You can check this here:

 If this does not work, just add the iso into the IDE controller of virtualbox:

 As root you have to mount the image:

Before you can run the installer you have to get the following packages:

yum list kernel*

Take the one with "devel" which version matches:

uname -a

Linux localhost.localdomain 4.1.12-94.3.9.el7uek.x86_64 #2 SMP Fri Jul 14 20:09:40 PDT 2017 x86_64 x86_64 x86_64 GNU/Linux

Something like

yum install kernel-uek-devel-XXXXXX

Then install the follwing packages:

yum install dkms binutils gcc make patch libgomp glibc-headers glibc-devel bzip2

Then export KERN_DIR:

Finally you can run the installer VBboxLinuxAdditions.run:

Then a reboot and everything should be fine.
The walkthrough the Oracle Linux installation process can be found here.
(Preconfiguration steps for virtualbox can be found here)