I am going to ask the same questions and give the same suggestions as I did here
Will this certification give you anything beyond personal satisfaction?
Before you start down the road of getting a certification you should find out whether or not it's actually worth anything. The only reason that I see for you to get a certification is because someone else pays for it.
So start by answering the following questions:
- Are there Jobs requiring Ubuntu certifications?
- Do they pay more then the ones without it?
If not then the certification might be only for personal satisfaction.