Thousands of people have testified to the value of the Oracle Certification Program as follows:
You have until December 21st to take the new Oracle Linux 5 & 6 System Administrator OCA Certification exam in its beta form. During the beta phase, you get a fully fledged certification at a much reduced price, for example $50 in the United States and 39 euros in the euro zone.
To see what is covered in this exam, look at the Exam Topics on the certification page.
For information about the Oracle Linux curriculum, go to http://oracle.com/education/linux.