A system administrator has a filesystem called /test/data in volume group datavg. Which of the following commands will allow the administrator to create a mirrored copy of the filesystem’s data？（）

单项选择题Asystemadministratorcancreatelogicalvolumesandthenaddfilesystemstothem，orcreatethefilesystemdirectly.Whatisanadvantageofthetwo-stepapproachinsteadoftheone-stepapproach？（）

A.The number of bytes per inode can be specified.
B.Placement of the filesystem on the disk can be specified.
C.The jfslog can be specified on creation of the filesystem.
D.Either a JFS or JFS2 filesystem can be created on the logical volume.

单项选择题Whichcommandlistsoutthephysicalvolumenamesaswellastotal freePPsinvolumegroupdatavg？（）

A.lsdev -Cl datavg
B.lsvpcfg datavg
C.lspv -p datavg
D.lsvg -p datavg

单项选择题Diskshdisk1andhdisk2areassignedtodatavg.Whichofthefollowingcommandsshouldbeusedtodeterminewhichlogicalvolumesarepresentonhdisk1？（）

A.lspv -l hdisk1
B.lsvg -l datavg
C.lslv -p hdisk1
D.lsattr -El hdisk1

单项选择题The$HOME .netrcfilecontainsinformationusedbytheautomaticloginfeatureofwhatcommand？（）

A.rsh
B.ftp
C.ssh
D.rlogin

单项选择题Auserwiththeuseridof’joe’isunabletorshfromSYSTEMAtoSYSTEMBwithouthavingtoretypetheirpassword，buttheycanrshfromSYSTEMBtoSYSTEMA.Nootherusersareexperiencingthesameissue.Bothsystemshavea home joe .rhostsfilethatcontaintheproperreferencestotheotherhost.The home joe .rhostsfilesonbothSYSTEMAandSYSTEMBareownedbyuserid’joe’.Whichofthefollowingisthemostlikelycauseofthisproblem？（）

A.User ’joe’ is specified in the /etc/nologin on SYSTEMA
B.User ’joe’ is specified in the /etc/nologin on SYSTEMB
C.The file permissions on the /home/joe/.rhosts file on SYSTEMA is correct.
D.The file permissions on the /home/joe/.rhosts file on SYSTEMB is incorrect.