Hi all, the instructions given in the article avoid to mention a setup pre-requisite which is "Installing VirtualBox Guest Additions" on the guest machine, that is to say installing it on our CentOS based HDP Sandbox VM. Simple ? .... Not really ! The devil is inside the details. In Virtualbox documentation Chapter 4 Guest Additions, it is said; So we have a pre-requisite of our pre-requisite, which consists of "preparing [our] guest for building external kernel modules" And our HDP 2.6.4 doesn't seem ready: the running kernel (4.4.x id I'm right) and the kernel-devel and kernel-headers versions do not match), which is a condition that is checked during the installation process. Trying to update the kernel-devel/kernel-headers to match the 4.4.x version, I ended up with a conflict and I was unable to update the kernel-headers with the 4.4.x version. Removing the package (before reinstalling the 4.4.x version) doesn't seem an option neither, because of its dependancies: At the end, I didn't succeed in mouting shared folders into my HDP 2.6.4. Any help will be very appreciated. Philippe My config: host: Windows 10 + VirtualBox 5.2.8 guest: HDP 2.6.4 Usefull links: https://www.if-not-true-then-false.com/2010/install-virtualbox-with-yum-on-fedora-centos-red-hat-rhel/ https://www.if-not-true-then-false.com/2010/install-virtualbox-guest-additions-on-fedora-centos-red-hat-rhel/ https://access.redhat.com/discussions/3075051 http://ftp.colocall.net/pub/elrepo/archive/kernel/el7/x86_64/RPMS/ ... View more