A.rshB.ftpC.sshD.rloginThe$HOME .netrcfilecontainsinfor……

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.

单项选择题AsystemadministratorwantstocoupletwoserverstogethersothatusersfromserverAcanaccessserverBwithoutenteringtheirpassword.Howwouldthisbeaccomplished？（）

A.employ NIS to synchronize user names and passwords
B.create a /.rhosts on server A and serve B
C.create a $HOME/.netrc for all users on server A and serve rB
D.create a /etc/hosts.equiv on server A and server B

单项选择题Thefollowingentryisinthe etc host.equivand home jsmith .rhostsfileonserverAlpha：+jsmith.Whatdoesthisentryindicate？（）

A.The user "jsmith" can use r-commands from any server to server Alpha system-wide
B.The user "jsmith" can use r-commands from server Alpha to any server system-wide
C.The user "jsmith" can use r-commands from server Alpha to any server with a /home/jsmith directory
D.The user "jsmith" can use r-commands from any server to server Alpha only in the /home/jsmith directory

单项选择题Howcanthesystemadministratordetermineifasystemisrunningin32-bitor64-bitmode？（）

A.Use ’prtconf -c’ to see if the system is 64-bit enabled
B.Check the /etc/inittab to see if /etc/method/cfg64 is enabled
C.Use the ls -al to see if /unix is linked to /usr/lib/boot/unix_64
D.Use the lslpp command to see if the bos.mp64 fileset is installed

单项选择题Whichofthefollowingactionswillenable64-bitapplicationsonasystemwitha32-bitkernel？（）

A.change the kernel to 64bit， reboot， and then use the following command：chdev -l sys0 -a applications=64_bit
B.Re-install the OS with 64-bit kernel enabled
C.Re-install all applications with 64-bit versions
D.Use smit to enable the 64-bit applications