单项选择题
Which command will create a group called ‘delivery’and set the administrators to john’ and ‘mary’?（）
A.mkgroup -A=john,mary delivery
B.groupadd -A=john,mary delivery
C.mkgroup adms=john,mary delivery
D.groupadd adms=john,mary delivery
单项选择题 Which command shows dump components and controls live dump attributes?（）
单项选择题 Which method will configure an e-mail notification when permanent hardware errors are logged in the errorlog?（）
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?（）