I'm new to VirtualBox and Linux. I've set up VirtualBox 4.0.4 on Windows 7. Successfully created a virtual machine running Ubuntu server 10.10 64 bit. I'm trying to set up Shared Folders. Prerequisite is Guest Additions. I've followed the Manual, as much as I understand it, and have Googled the heck out of trying to get past this. Here's what I've done:

  1. sudo aptitude update
    sudo aptitude safe-upgrade
    sudo apt-get install dkms
  2. Devices > Install Guest Additions... (nothing apparently happens, but I hear that's ok)
  3. Devices > CD/DVD Devices > [peek at the dropdown: bottom line has Remove disc from virtual drive, so I think that means the ISO is in the virtual CD-ROM drive
  4. Change to directory where your CD-ROM drive is mounted and execute as root, so I: cd .., cd .., cd media, cd cdrom. (am I even in the right place?!)

I try sh ./VBoxLinuxAdditions.run and sudo sh ./VBoxLinuxAdditions.run I get

sh: Can't open ./VBoxLinuxAdditions.run

I try bash ./VBoxLinuxAdditions.run and sudo bash ./VBoxLinuxAdditions.run I get:

bash ./VBoxLinuxAdditions.run no such file or directory

I try chmod +x VBoxLinuxAdditions.run and get no such file or directory

It seems I'm in the wrong directory, the right files aren't where I need them, wrong permissions, or wrong commands. I'm totally lost since every troubleshooting point I've seen on Google either hasn't worked for me when it did for others, or I just don't understand the instructions. Thanks in advance for any help.

This is what mount shows

enter image description here

  • @Joe Fletcher - Are you sure you have installed Server? Server is terminal interface only. If you're new to Linux I would suggest "regular" Linux flavour
    – Darius
    Mar 24, 2011 at 2:02
  • Yes, Server. I've been using the terminal. I'm developing websites. I'm not super new to Linux, but I only a few commands and such. Mar 24, 2011 at 2:38
  • @Joe Fletcher - If you don't me asking, what do you need Shared Folders in Ubuntu Server for?
    – Darius
    Mar 24, 2011 at 2:52
  • @Joe: My version of the VirtualBox Linux Additions has two different .run files for the architecture of your Linux VM: VBoxLinuxAdditions-x86.run for 32-bit and VBoxLinuxAdditions-amd64.run for 64-bit. (You most likely have 32-bit.) You're missing the -x86 or -amd64 in your examples. Could that be it?
    – Patches
    Mar 24, 2011 at 2:53
  • 1
    @Joe indeed, the ISO isn't mounted. I've just reached work so I can't check on this right now. Once I get back home ( still 8+ hours to go!) I'll take a look
    – Sathyajith Bhat
    Mar 24, 2011 at 4:25

2 Answers 2


As I mentioned in the comments, seems the ISO is not mounted. Here's what you can do

  • Ensure that the guest additions ISO is available to the host. You can do this by clicking on Devices menu -> CD/DVD devices and point to the GuestAdditions ISO file. The Guest additions is available in Program Files\Oracle\VirtualBox folder

enter image description here

  • With that mounted, type in the below

    cd /media
    mkdir vbox
    sudo mount /dev/sr0 vbox/
    cd vbox/
  • Now, the guest installation ISO is mounted as /media/vbox

enter image description here

  • Run the Guest additions installer by tying ./VBoxLinuxAdditions.run
  • You're a genius! Worked like a charm. I ran all commands with sudo and re-started, and it seemed to work. I got 2 error messages, but not sure if those matter (link). Mar 25, 2011 at 3:42
  • Quite welcome @Joe. You can ignore those messages, it shouldn't affect you
    – Sathyajith Bhat
    Mar 25, 2011 at 5:45
  • For those of you who are still having problems it might be you're missing the following packages: dkms, build-essential, and linux-headers-generic. read more try running: sudo apt-get install dkms build-essential linux-headers-generic then reboot. After reboot mount the share like mentioned above.
    – Andres
    Mar 4, 2012 at 20:44
  • Funny that there is no mention of how to mount /dev/sr0 in the VirtualBox docs. Or did I miss something?
    – Eric J.
    Sep 24, 2012 at 22:21
  • @EricJ. it's not always necessary to mount - typically clicking on "Install guest additions" will mount the guest additions ISO - sometimes, this can fail however.
    – Sathyajith Bhat
    Sep 25, 2012 at 5:52

If worse comes to worse, you can always install the desktop and use the GUI to install it...

sudo apt-get install ubuntu-desktop

and restart.

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