An administrator received a call from a user whose PC crashed while using vi to edit a file. The user wants the edited file back. Where should the administrator look for the file（）

单项选择题UnderwhichofthefollowingcircumstancesmustaJFSfilesystembeusedinsteadofaJFS2filesystem（）

A.filesystem will contain 100GB files
B.filesystem resides on a 32-bit system
C.filesystem contains a large number of small files
D.filesystem compression is required

单项选择题Anadministratorneedstochangeasystem’srunlevelfromlevel2tolevel3.Whatistheappropriatemethodtoaccomplishthis（）

A.Use the reboot command.
B.Edit the /etc/reboot file and reboot the system.
C.Edit /etc/.init.state file and reboot the system.
D.Use the telinit command

单项选择题Anadministratorneedstobeabletolistthenumberandsizeofbackupsetsonatape.Whichofthefollowingproceduresaccomplishthis（）

A.Use the tcopy /dev/rmtO.l until an end-of-tape error notification is received.
B.Use the cpio -idmv < /dev/rmtO.l until an end-of-tape error notification is received.
C.Use the tar -tvf /dev/rmtO.l repeatedly until an end-of-tape error notification is received.
D.Use the dd if=/dev/rmt0.1 bs=128k count=EOT until an end-of-tape error notification is received.

单项选择题Auserwantstobepermanentlyaddedtothedbagroup.Whichofthefollowingcommandsorprocessescanbeusedtoaccomplishthis（）

A.chgrp
B.chuser
C.edit /etc/user
D.edit /etc/security/group