November 28, 2012, 2:59 PM — Here's how you can download Chromium OS to your Ubuntu 12.10 or 12.04 computer.
1. Open a terminal window.
2. Type in the following commands then hit Enter after each.
mkdir ~/ChromiumOS; cd ~/ChromiumOS
wget -c http://goo.gl/ICSpt -O ChromeOS-Vanilla-3274.0.zip
mv ChromeOS*.img ChromeOS.img
For more, see the original article at the link below.