VirtualBox install guest additions Ubuntu

Install guest additions in Ubuntu VirtualBox.

Download latest guest additions iso at http://download.virtualbox.org/virtualbox/

$ wget http://download.virtualbox.org/virtualbox/4.3.8/VBoxGuestAdditions_4.3.8.iso
$ mkdir ~/vbox
$ sudo mount VBoxGuestAdditions_4.3.8.iso ~/vbox
$ sudo bash ~/vbox/VBoxLinuxAdditions.run
$ ls /media/

Your shared folders will now be accessible without restarting.

OR download to the host. Mount the iso on the guest and install.

$ mkdir ~/vbox
$ sudo mount /dev/sr0 ~/vbox
$ sudo bash ~/vbox/VBoxLinuxAdditions.run