I wanted to check out the latest (12.04) version of Ubuntu to see if the Unity shell had improved, so I booted my Dell Latitude with a live DVD.
My laptop is connected to a docking station, and I have two monitors hooked into it. Happily, the system started properly and even detected the two monitors. Oddly, Unity's launcher bar appeared on each screen.
When I pressed the Ubuntu Dash button, I saw a close button ("x") to kill the Launcher on the right monitor, but then I saw that I could close the left monitor's Launcher too. When I did that, I saw no way to respawn the Launcher.
My question is two-fold: a) how do I relaunch Launcher if it's been closed, and b) how do I configure the system to only load a Launcher on the left monitor?