Connect the iPod to your computer. Launch iTunes. Select your iPod. Under Manually Back Up and Restore, select Back Up Now. [2] X Research source
An iPod Touch 2G will likely be operating iOS 4. 2. 1 or 4. 1, but it’s possible that it may be running something from iOS 3. The model should either be MC or MB. [3] X Research source
Note that Redsn0w is compatible with iOS 4. 2. 1 and the MB model of the iPod Touch 2G only. If you are running a different iOS or have the MC model, you will have to use different software. [4] X Research source Make sure you download the appropriate version depending on whether you’re using Mac or PC.
Be sure to watch your desktop during the process, as the Limera1n program will provide you with prompts.
Make sure your device is turned on and not plugged in.
Cydia is essentially an app store for jailbroken Apple devices that you can use to purchase new applications and extensions. It gets installed on your device during the jailbreaking process. [6] X Research source