单项选择题
A filesystem failed to successfully mount， indicating the error message： 0506-324 - cannot mount media not formatted or invalid format 0506-342 - Superblock is dirty run fsck Which parameter can be passed to the fsck command to automatically take any remedial action required？（）
A.-p B.-y C.-f D.-v
单项选择题 Howcantheadministratorusefile’a’containing’-Elsys0’toviewtheattributesofadevice（）？
单项选择题 Whichsystemprovidesredundantsystemclocks？（）
单项选择题 Duringanattemptto’scp’betweentwohosts，anerrorindicatingPRNGisnotseededisdisplayed.Whatisthelikelycauseoftheerror？（）
