Make It Easy

I am doing this on

• VirtualBox 5.0.12
• Windows 8.1 64 bit Host
• CentOS 7 server 64 bit guest up to date

Steps

• Start CentOS 7 guest
• From the Devices Menu,go to Optical Drives and remove previous CD/DVD using the Remove Disk from VirtualDrive
• Then click on Devices and select Insert Guest AdditionsCD Image.
• This will put the Guest addition cd into /dev/cdrom in CentOS
• SSH into CentOS and mount the cdrom with the command

mount /dev/cdrom /mnt

• Install required libraries

sudo yum install bzip2 gcc kernel-devel dkms

• install the guest addition, nox11 is to indicate that we dont have a GUI

bash /mnt/VBoxLinuxAdditions.run --nox11

• It will install and finally give some messages like below

Verifying archive integrity... All good.
Uncompressing VirtualBox 5.0.12 Guest Additions for Linux............
VirtualBox Guest Additions installer
Removing installed version 5.0.12 of VirtualBox Guest Additions...
Removing existing VirtualBox DKMS kernel modules[ OK ]
Removing existing VirtualBox non-DKMS kernel modules[ OK ]
Copying additional installer modules ...
Installing additional modules ...
Removing existing VirtualBox DKMS kernel modules[ OK ]
Removing existing VirtualBox non-DKMS kernel modules[ OK ]
Building the VirtualBox Guest Additions kernel modules[ OK ]
Doing non-kernel setup of the Guest Additions[ OK ]
You should restart your guest to make sure the new modules are actually used
Installing the Window System drivers
Could not find the X.Org or XFree86 Window System, skipping.

• Shutdown the CentOS VM and add shared folders and select Auto Mount
• Start the CentOS VM and the shared folder should be available at /media on CentOS