First of all Download Chromium OS from here (299 MB)
Update: Now the new update build by Hexxeh is named as Chromium OS Zero and it boasts serious speed improvements, automatic delivery of system updates, a reduction in the startup delay on Broadcom wifi adapters, and a slick, customized bootsplash graphic. The new Chrome OS now has full extension support and bookmark sync, which makes it easy to experiment.For Download and Instructions for new Chrome OS see this,
Install New Chrome OS with Wifi and Full Extension Supports.
After the download is completed, Extract the downloaded file, any where in your Computer. After the file is extracted You will get a file named ChromeOS-Cherry.img, left it there and continue to the Instructions given below.
If you are using Windows then follow these Instructions for installing Chromium OS to USB:
Download Image Writer for Windows (5 MB) and extract the downloaded file.Launch the program, by double clicking on file Win32DiskImager.exe and select the image (downloaded and extracted in first step) ChromeOS-Cherry.img and your USB drive Letter from the drop down box.Then Click on Write. Shown in figure
Wait until the writing process is completed .Once it is done, close the program and you can then boot from the USB drive.
If you are using Ubuntu then follow these Instructions for installing Chromium OS to USB:
First you need to install USB Image Writer using the following command in Terminal.
sudo apt-get install usb-imagewriter
Wait until usb-imagewriter is installed.After the installation is completed Lunch it, you will find it under Applications > Accessories > Image Writer.
Then simply select the ChromeOS-Cherry.img under “Write image”, select your USB drive, and click on the “Write on device” button
If you are using Other Linux then follow this Instructions for installing Chromium OS to USB:
Extract ChromeOS-Cherry.img and run the following command in the same directory as the file, where Z is the device name of your USB drive.
sudo dd if=ChromeOS-Cherry.img of=/dev/Z bs=4M
Once the command finishes, you can then boot from the USB drive.
NOTE:After you completed the above steps, Just insert the Pen Drive in the computer (must have a working wired Internet connection) in which you want to Boot Chrome OS from USB Pen Drive, then restart the computer and modify the BIOS settings if needed (enter in to the BIOS setting by pressing the appropriate key (generally ‘F2’ or ‘Del’ or ‘F10’) at the instant just before Computer will Boot and change the Boot order and set USB Device at #1 (highest priority).Then save and exit).
Troubleshooting:
Q: What are the default username/passwords for this build?
A: Default username is facepunch, default password is facepunch.
Q: It says “Resource Busy”! What’s up?
A: You forgot to dismount the drive. Do this, then retype the command and you should be fine.
Q: I’m getting the following error, what’s up? “The server’s security certificate is revoked!”
A: This is a known bug with Chrome, and a way to fix it is simply to make sure the timezone setting in ChromeOS/Chrome is set to your correct timezone to match the system
clock.
Q: Help, I can't get past the login screen becuse of a network error!
A: Simply login with the details above and try and get your internet working, reboot and the settings will be remembered, allowing you to login with your Google Account as normal.
Q: Help, it doesn't boot!
A: Firstly, check your file downloaded properly. Then, try reimaging the image onto the USB drive and booting from it again. Try another USB drive if you can, and if it still doesn't work, it's your laptop that isn't compatible in all likelyhood.
Q: WiFi/some other component isn't working, can you help?
Q: It runs really slowly, isn't this supposed to be super fast?
A: Sadly not, the hardware support in ChromiumOS is really quite limited, but manufacturers are hard at working adding the changes needed to get it running smoothly.
Q: I tried formatting my USB drive after trying this out and it's smaller than it was! What gives?
A: You need to repartition your USB drive. Use the appropriate tool on your OS to create one large partition in place of the three small ones. (In Windows: Disk Management or Hp Format Tool, In Linux: fdisk).
