单项选择题 An administrator needs to determine what the default run level of a system is.  Which command would be used（）

单项选择题 An  administrator  can  create  logical  volumes  and  then  add  file  systems  to  them，  or  create  the  file  system directly.  What is an dvantage of the two-step approach instead of the one-step approach（）

单项选择题 An administrator suspects someone is modifying a sensitive file， and wants to log access information for this file.  Which of the following AIX component accomplishes this（）