"If you're an I.T. professional working with Linux, you have
a handful of options if you want a certification, and the vendors
are jockeying for the position as the dominant product."
"Linux users can choose among a distribution-specific hands-on
training and certification program (Red Hat), a test-and-training
combo (Sair Linux and GNU Certification), or a community-driven
test where you choose your own training (Linux Professional
Institute). Another cottage industry of Linux training companies
has sprung up around the certifications."
"Most people in the Linux certification industry say there's
room for more than one product, and the vendors all have
heavyweight backers -- Red Hat, of course, backs the Red Hat
certification; Thomson Corp. owns Sair; and distributions such as
SuSE, Caldera, and Mandrake have rallied around LPI."