GnomeBaker is a free CD/DVD writer for ubuntu gnome.It’s easy to burn CD/DVD in ubuntu with Gnomebaker.

First,just run this command to install GnomeBaker

sudo apt-get install gnomebaker

Then,at right top of your screen,click to Applications->Sound&Video->GnomeBaker CD/DVD writer to open it up.

burn

In tools menu,you can select burn date,audio,.iso image CD/DVDs.Select one,then add the file you want to burn at the middle of this screen.