Reinstall VirtualBox on Ubuntu & CentOS

For Ubuntu
To remove virtualbox

sudo dpkg --list virtualbox-*
sudo apt autoremove --purge virtualbox*
dpkg -l virtualbox* | grep ^i

Remove all PPAs from sources.list and source.list.d directory

mkdir ~/apt-tmp
sudo mv /etc/apt/sources.list.d/* ~/apt-tmp

Make sure there is nothing except official repositories sources in /etc/sources.list.

And update your sources:

sudo apt update

Now we can search to see which versions are available to install:

apt-cache madison virtualbox | grep -iv sources

Which produces an output like this:

virtualbox | 5.0.32-dfsg-0ubuntu1.16.04.2 | http://mirrors.kernel.org/ubuntu xenial-updates/multiverse amd64 Packages
virtualbox | 5.0.18-dfsg-2build1 | http://mirrors.kernel.org/ubuntu xenial/multiverse amd64 Packages

Then I would install the last version mentioned in xenial-updates:

sudo apt install virtualbox=5.0.32-dfsg-0ubuntu1.16.04.2

And after all, check that the correct version is installed.

From command line:

dpkg -l virtualbox* | grep ^i

ii  virtualbox                     5.0.32-dfsg-0ubuntu1.16.04.2 amd64        x86 virtualization solution - base binaries
ii  virtualbox-dkms                5.0.32-dfsg-0ubuntu1.16.04.2 all          x86 virtualization solution - kernel module sources for dkms
ii  virtualbox-qt                  5.0.32-dfsg-0ubuntu1.16.04.2 amd64        x86 virtualization solution - Qt based user interface

From GUI: to make sure correct version is running.

Install virtualbox extension pack

sudo /sbin/vboxconfig
sudo apt install virtualbox-ext-pack

For CentOS

1. Display VirtualBox installed

sudo yum update
sudo yum list installed | grep -i VirtualBox

2. Remove VirtualBox-5.1

sudo yum remove VirtualBox-5.1

3. Add Required Yum Repositories

cd /etc/yum.repos.d/
wget http://download.virtualbox.org/virtualbox/rpm/rhel/virtualbox.repo

4. Install Required Packages 

yum install gcc make patch  dkms qt libgomp
yum install kernel-headers kernel-devel fontforge binutils glibc-headers glibc-devel

5. Reboot ans start with newest kernel

reboot

6. Reboot ans start with newest kernel

export KERN_DIR=/usr/src/kernels/`uname -r`

7. Install Oracle VirtualBox and Setup

yum install VirtualBox-5.2

8. List vbox modules (vboxpci, vboxnetadp, vboxnetflt, vboxdrv)

lsmod | grep -i vbox

9. Goto https://www.virtualbox.org/wiki/Downloads and run VirtualBox Extension pack for CentOS

Oracle_VM_VirtualBox_Extension_Pack-5.2.0-118431.vbox-extpack

10. List and add user to vboxusers group

cat /etc/group | grep -i vboxusers
sudo usermod -a -G vboxusers $user_name

11. /var/log/vbox-install.log

Change UUID for VirtualBox

sudo VBoxManage internalcommands sethduuid <file.vdi or file.vmdk>

Refer to:
  1. https://askubuntu.com/questions/900794/virtualbox-rtr3initex-failed-with-rc-1912-rc-1912
  2. https://www.if-not-true-then-false.com/2010/install-virtualbox-with-yum-on-fedora-centos-red-hat-rhel/