While using the smit install_remove menus to remove some filesets on an AIX 5.3 server， a system administrator notices the /usr filesystem is now unnecessarily large. 
Which of the following actions will reduce the size of the /usr filesystem （）

单项选择题Given the following script， why does the output come out as an empty line instead of  dog （）#! bin ksh  $VAR=dog  echo  ${VAR}

A.The $VAR variable was not exported.
B.The $VAR should have been set as VAR.
C.dog needs double quotes around it when setting $VAR.
D.The { } should not be around VAR in the echo command.

单项选择题Whichofthefollowingcommandswouldanadministratorusetoaddstartupscriptstothesystemstartupprocess（）

A.chitab
B.vi /etc/inittab
C.vi /etc/rc.d
D.mkitab

单项选择题Using splitvg to create a snapshot volume group of rootvg results in an error.  What is the most likely cause of the error（）

A.There is not an available disk to allocate to the snapshot volume group
B.One of the physical volumes associated with rootvg has a status of "missing"
C.Rootvg is running in enhanced concurrent mode
D.A snapshot volume group cannot be created for the rootvg

单项选择题The df command indicates that a filesystem is full， however， the du command indicates that not all space is allocated.  How would the system administrator isolate the discrepancy（）

A.Use the fuser command to identify deleted but open files.
B.Use the ipcs command to view orphan shared memory segments.
C.Use the defrag command to determine if the filesystem is fragmented.
D.Use the topas command to identify processes using the most system resources.

单项选择题everal people in an finance customer IT department are asking for fileset updates that the  system administrator received from IBM earlier that day on CD-ROM. The system administrator created an install directory on their machine and made it available to everyone.  Which of the following commands will allow the system administrator to copy the images from an IBM update CD-ROM to the install directory（）

A."smit bffcreate" from the target directory
B."tar -xvf /dev/cd0" from the target directory
C."restore -xvqf /dev/cd0" from the target directory
D.mount the cdrom on /cdrom and run "cp /cdrom/* ." from the target directory