ubuntu virtual box guest additions update

ubuntu_guest_additions.txt

http://ubuntuhandbook.org/index.php/2015/05/virtualbox-4-3-28-released-how-to-upgrade/

Install vagrant guest additions:
vagrant plugin install vagrant-vbguest

If you want to add VBox official Linux repository and receive future updates, do below steps:

1. Open terminal from the Dash or by pressing Ctrl+Alt+T. When it opens, run command to add VBox repository:

sudo sh -c 'echo "deb http://download.virtualbox.org/virtualbox/debian $(lsb_release -cs) contrib" >> /etc/apt/sources.list.d/virtualbox.list'
2. Run command to download and install the keyring:

wget -q https://www.virtualbox.org/download/oracle_vbox.asc -O- | sudo apt-key add -
3. Finally upgrade VBox 4.3 via Software Updater , or install it for the first time via below 2 commands:

sudo apt-get update

sudo apt-get install virtualbox-4.3