单项选择题
A./profile
B./etc/envpath
C./etc/profile
D./etc/environment
单项选择题 Duringsystemboot，rootvgfailstovaryon，causinganLEDcodeof0552.Whatisthemostlikelycauseforrootvgnotvaryingon？（）
单项选择题 Anadministratorismovingavolumegroupfromoneservertoanother.Thediskswillbephysicallymovedbetweenthetwosystems.Whichtwooperationsarerequiredonthevolumegrouppriortothephysicaldiskswitch？（）
单项选择题 Anadministratorlearnsthatusersareunabletologintoaserverviassh.Aftermakingatelnetconnectiontotheserver，howcantheadministratorcheckthestatusofthesshdsubsystem？（）