Ubuntu 17.10 as VirtualBox guest : missing vboxsf module

Running Ubuntu 17.10 as a VirtualBox guest works fine except for accessing files located on the host.
Only vboxguest and vboxvideo modules are available and loaded.
vboxsf module is missing.
Load the Guest Additions ISO image and let run the installer.

On a fresh new install, you may have this error :

Make sure to install the build-essential package :

apt install build-essential

One completed, reboot your system to make sure the right modules are loaded : vboxguest, vboxvideo, vboxsf

Once logged in, access to a directory located on your host may be denied.
Be sure that your user account is part of the vboxsf local group.
Add yourself :

usermod -aG vboxsf your_login

Log out and log in again. This should be good now


Lost connectivity to the device mpx.vmhba32:C0:T0:L0 backing the boot filesystem


This issue appeared on HP blade Proliant XL170r Gen9 running ESXi 6.0.0, 4192238.
Make sure that your blades have their firmwares updated to the latest version.
Have a look at iLO self-Test Results :

Before firmwares upgrade :

After firmwares upgrade :

Retrieve a ticket to register the Virtual SAN VASA Provider

If you get a message within your vSphere client “Retrieve a ticket to register the Virtual SAN VASA Provider” for each of your ESXi host, this is a bug that appeared in vCenter Server 6.0 Update 2.
This bug is known but harmless. No patch available to fix it for now.

More details in this KB :

VMWare KB2145308 : Retrieve a ticket to register the Virtual SAN VASA Provider

How to install VirtualBox Guest Additions kernel modules on Debian Jessie ?

To install VirtualBox Guest Additions kernel modules on Debian Jessie, make sure to attach the “Guest Additions” CD-ROM image.
Copy the “VBoxLinuxAdditions.run script to /tmp

Then run it as below :Virtualbox_guest_additions_tools_missing_compilation_tools


Install the missing tools gcc and make :

[fool@localhost:~]$ sudo apt-get install gcc make

Run the script again :



There is still a missing dependency :


Install it :

[fool@localhost:~]$ sudo apt-get install linux-headers-$(uname -r)

The VirtualBox Guest additions kernel modules can now be compiled and be loaded successfully :


vSphere vCenter : 503 service unavailable

Having either of these errors can lead to some services not started on the vCenter server.

503 Service Unavailable (Failed to connect to endpoint: [class Vmacore::Http::NamedPipeServiceSpec:00000000011D7F00] _serverNamespace = / _isRedirect = false _pipeName =\\.\pipe\vmware-vpxd-webserver-pipe)

503 Service Unavailable (Failed to connect to endpoint: [class Vmacore::Http::LocalServiceSpec:00000000012B0BA0] _serverNamespace = /vsphere-client _isRedirect = false _port = 9090)

If your vCenter is running on a Windows box, checking the status of its services can provide some first-hand information :

cd C:\Program Files\VMware\vCenter Server\bin

./service-control --status

To stop all the services :
./service-control --stop --all

To start all the services :
./service-control --start --all

VMWare KB 2109881