单项选择题
A.User ’joe’ is specified in the /etc/nologin on SYSTEMb.
B.User ’joe’ is specified in the /etc/nologin on SYSTEMa.
C.The file permissions on the /home/joe/.rhosts file on SYSTEMA are incorrect.
D.The file permissions on the /home/joe/.rhosts file on SYSTEMB are incorrect.
单项选择题 WhichofthefollowingcommandsmayindicatehardwareredundancyprotectionofaPV（）
单项选择题 Sometimes performance is more important than availability （e.g.， in cases where the data can be easily re-created）. Which of the following is the appropriate disk configuration for an application that requires faster writes over availability（）
单项选择题 A System p administrator noticed several error messages on the screen while the system was booting up； but was not able to write them down. Where should the system administrator look for the console log， assuming it is in the default location（）