Bernhard Buehler is an IT Specialist for availability solutions on IBM Power Systems in Germany. He works for IBM Systems Lab Services. He has worked at IBM for 39 years and has 30 years of experience in AIX and the availability field. His areas of expertise include AIX, Linux, IBM PowerHA®, HA architecture, shell script programming, and AIX security. He is a co-author of several IBM Redbooks publications and of several courses in the IBM AIX curriculum.