I Can't Execute Command Modprobe Vboxdrv

I can't execute command modprobe vboxdrv

I got into same problem

Solved it by disabling secure boot option.

Go to BIOS configuration and disable secure boot.

Sign virtual box modules (vboxdrv, vboxnetflt, vboxnetadp, vboxpci) Centos 8

After some research, I found the solution.

Solution 1 : disable secure boot.

Solution 2 :

1- Install mokutil package

sudo dnf update
sudo dnf install mokutil

2- Create RSA key under new folder.

sudo -i
mkdir /root/signed-modules
cd /root/signed-modules
openssl req -new -x509 -newkey rsa:2048 -keyout MOK.priv -outform DER -out MOK.der -nodes -days 36500 -subj "/CN=VirtualBox/"
chmod 600 MOK.priv

3- This command will ask you to add a password, you need this password after the next reboot.

sudo mokutil --import MOK.der

4- Reboot your system and a blue screen appear, select Enroll MOK --> Continue --> put the previous password and your system will start.

5- Put the previous cmmands in a script to run it later (after system update)

cd /root/signed-modules
vi sign-virtual-box

Add the following cmd to this script :

#!/bin/bash

for modfile in $(dirname $(modinfo -n vboxdrv))/*.ko; do
  echo "Signing $modfile"
  /usr/src/kernels/$(uname -r)/scripts/sign-file sha256 \
                                /root/signed-modules/MOK.priv \
                                /root/signed-modules/MOK.der "$modfile"
done

Use the below to find signfile if the above fails & edit script accordingly.

find /usr/src -name sign-file

5- Add exec permission and run the script

chmod 700 sign-virtual-box
./sign-virtual-box 

6- Launch VirtualBOx

modprobe vboxdrv

For more info see this link (for ubuntu users)
https://stegard.net/2016/10/virtualbox-secure-boot-ubuntu-fail/

Failed to update Virtualbox on ubuntu 15.10

Check if Secure Boot is Enabled in your BIOS. If so, disable it. These are for 16.04 (it worked for me in 14.04):

https://askubuntu.com/questions/762136/cannot-reinstall-virtualbox-on-ubuntu-16-04

https://unix.stackexchange.com/questions/282265/starting-virtualbox-kernel-modules-failed

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