K3B is a very good application for burning CDs and DVDs for your Linux. It is absolutely free and easy to use. You can burn data CDs/DVDs create audio CDs, copy CDs, burn CD images and ISO files. The default settings are optimized so that majority of users do not have to change any. If you are experienced or would like to play around with settings the K3B burning software has a lot of advanced features.
Here is the link to the application. K3B