What Does Ubuntu Certified Professional Mean?
An Ubuntu Certified Professional is someone who has completed and passed the Ubuntu Professional Certification (UPC) course. This certification was offered from 2006 to 2010 and was aimed at Ubuntu systems administrators.
Techopedia Explains Ubuntu Certified Professional
The UPC course was administered by the Linux Professional Institute, an office that still offers various certification processes for Ubuntu. The UPC course was part of the Linux Professional Institute Certification (LPIC) that is still offered to IT professionals, particularly those who administer a Linux system.