Guest Additions Install Fails without any errors

[37vbuser19X]

Using CentOS7 x86_64 with kernel 3.10.0-1127.19.1el7.x86_64 with VirtualBox 6.1 with Windows 10 laptop as the guest.

I tried to install VirtualBox, there are no errors output to the screen or to the logs under /var/log, however upon rebooting Guest Additions does not work.

These are the steps that I followed:

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install latest kernel

mount VB Guest Additions

install the following package: yum install -y epel-release or go to home page to get the correct URL:

https://www.fedoraproject.org/wiki/EPEL

install the following packages either by repo or hand: gcc kernel-devel kernel-headers dkms make bzip2 perl

add running kernel env variable: KERN_DIR=/usr/src/kernels/`uname -r`

export KERN_DIR

- mount /dev/cdrom /media/cdrom

install Guest Additions and run the following: ./VboxLinuxAdditions.run

Reboot

If I check the loaded modules, it shows the following:

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vboxsf      81052     0
vboxguest   349038    0  vboxsf

Anything I find online that talks about installing Guest Additions, never talks about how to deal with it when it doesn't install correctly.

thanks

[scottgus1]

Take a look here: viewtopic.php?f=3&t=99911 try that OP's suggestion.