Which of the following commands will display, in MB, the total, used, and free blocks of the currently mounted filesystems?（）A、df -mB、du -mC、df -vmD、du -vm

Which of the following commands will display, in MB, the total, used, and free blocks of the currently mounted filesystems?（）

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第1题：

单选题

Which one of the following RMAN commands is used to register the database files with repository that were backed up using O/S commands？（）

A

CHANGE

B

CATALOG

C

CROSSCHECK

D

SWITCH

正确答案： B

解析：暂无解析

第2题：

Which of the following commands indicates the packet count for each interface？（）

正确答案:C

第3题：

Which of the following commands will be run at a command prompt to determine which WindowsOS is running on the computer?（）

正确答案:A

第4题：

Which of the following commands verifies connectivity between two hosts?（）

正确答案:C,E

第5题：

Which of the following commands is used to delete an empty directory?（）

正确答案:A

第6题：

Which of the following commands will make a new directory?（）

正确答案:B

Which of the following commands