单项选择题
A.The $VAR variable was not exported.
B.The $VAR should have been set as VAR.
C.dog needs double quotes around it when setting $VAR.
D.The { } should not be around VAR in the echo command.
单项选择题 Whichofthefollowingcommandswouldanadministratorusetoaddstartupscriptstothesystemstartupprocess（）
单项选择题 Using splitvg to create a snapshot volume group of rootvg results in an error. What is the most likely cause of the error（）
单项选择题 The df command indicates that a filesystem is full， however， the du command indicates that not all space is allocated. How would the system administrator isolate the discrepancy（）