单项选择题
A.sysdumpdev -k
B.sysdumpdev -L
C.sysdumpdev -K
D.sysdumpdev -P
单项选择题 WhichofthefollowingcommandsisusedtodeterminetheroutethattheIPpacketstaketoanetworkhost?（）
单项选择题 Whichofthefollowingstatementsbestdescribeserrorlogging?（）
单项选择题 Ithasbeendeterminedthatprintjobsfromanapplicationarenotbeingremovedfromthesystemaftertheyhavebeenprinted.Toremovethesejobsfromthe/var/spooldirectory,whichcronentrywillremovefilesmorethan7daysold?（）