Linux: Getting more workspaces and tweaks in Ubunutu 14.04
The workspace option can be found in Appearance – Behaviour – Enable Workspaces
To get more workspace options install the following:
sudo apt-get install unity-tweak-tool
sudo apt-get install gnome-tweak-tool
Once installed, you can run the tweak application to change the number of workspaces and perform other tweaks.