单项选择题 The system administrator is making system wide changes to a server, which will add to the PATH variable for the server environment. Where is the PATH variable found for the system?（）

单项选择题 During system boot, rootvg fails to vary on, causing an LED code of 0552. What is the most likely cause for rootvg not varying on?（）

单项选择题 An administrator is moving a volume group from one server to another. The disks will be physically moved between the two systems. Which two operations are required on the volume group prior to the physical disk switch?（）