Certification From the Linux Professional Institute
The LPI or Linux Professional Institute having been offering vendor neutral certification in Linux since 1999. With such a history this represents a mature certification that is well recognised world-wide.
They offer certifications in Linux starting with Linux Essentials and then moving up the levels of system administration certification from LPIC-1 through to LPIC-3. Linux Essentials is a professional development certification demonstrating your broad understanding of Linux and Open Source.
Although not required studying for the Linux Essentials may make a great foundation for your administration career in Linux. Enabling a gentle start into Linux and the command line. Many Colleges and Universities include this certification as part of general computing courses ensuring a grounding in Linux. There is a single exam requirement in gaining the Linux Essentials certification
Both the LPIC-1 and LPIC-2 require two exam for each qualification and LPIC-2 requires that you already have the LPIC-1 qualification. For LPIC-3 which represents specialisations in Linux the is one exam per speciality. To gain and LPIC-3 certification you will need LPIC-2.