A recently installed package needs to be rolled back to a previous version.
Which of the following commands will perform the task？（）

单项选择题A non-root user can run rsh commands from serverA to serverB， but attempts to run rsh  commands by the root user return with a permission error message. What action will resolve the problem？（）

A.Add root user to the /etc/hosts.equiv on serverB .
B.Create $HOME/.rhosts file for the root user on serverB .
C.Restart the rshd daemon with root enabled option on serverB .
D.Add entry to allow root user from serverA to the /etc/hosts.allow on serverB .

单项选择题An administrator has a server that must be upgraded from AIX 5.2 to AIX 5.3. The administrator also needs to use the 64-bit kernel with JFS2 filesystems in rootvg. All critical data resides in a non-rootvg volume group. Which of the following types of install could the administrator use to accomplish this？（）

A.Migration Installation
B.Update_All Installation
C.Preservation Installation
D.New and Complete Overwrite Installation

单项选择题An administrator just completed an AIX installation but suspects that not all filesets installed completely. Which of the following commands would verify that all filesets are completely installed？（）

A.installp -E
B.lslpp -E
C.lppchk -c
D.instfix -c

单项选择题An administrator has received an update CD with the latest technology level for AIX 5.3. The current operating system level of the server is at base AIX 5.3. What action needs to be taken to apply the new technology level to the server？（）

A.Run smit update_all
B.Run smit install_all
C.Boot from the installation media
D.Run the update_all command from the mounted CD

单项选择题Howcanadirectorynamed dir1beexcludedduringarestoreoffilesbackedupbynamewiththebackupcommand？（）

A.By using the restore -x option followed by /dir1
B.By adding an entry in the /etc/restore.exclude file
C.By using the restore -i option to enter interactive mode and executing the command：delete /dir1
D.By using the restore -i option when running restore to specify a text file containing ’/dir1’ as one of the lines in it.