Linux certification courses are part of the rapidly growing information technology training industry. Hundreds of different vendors now offer courses about and testing of Linux skill sets. However, because Linux is open-source software, no formal rules or mandates dictate the knowledge or level of expertise required for certification. If you are interested in certification and want to pursue a career or obtain employment with a company using Linux, you really should seek training. You can find a good list of companies that can provide training at www.ubuntu.com/support/training/, along with other resources.