Which of the following commands should be used to show the percentage of time that any given disk was busy？（）

单项选择题Themaxmbuffislowbydefaultforsystemsexpectinghighnetworktrafficand orusage.Whichofthefollowingutilitiesshouldbeusedtoreportrequestsformbufsthathavefailedand orbeendenied？（）

A. no
B. ping
C. netstat
D. ifconfig

单项选择题WhichofthefollowingcommandsshouldbeusedtodeterminewhichdiskofasystemisexperiencingadiskI Operformanceproblem？（）

A. filemon
B. istat
C. vmstat
D. iostat

单项选择题Whichofthefollowingcommandscanbeusedtocleanupafailedsoftwareinstallationprocess？（）

A. installp -D
B. installp -d
C. installp -C
D. installp -c

单项选择题Whichofthefollowingcommandscanbeusedtoreviewthesystemerrorlogs？（）

A. errpt -a
B. errpt -l
C. errdemon -l
D. syslogd -r

单项选择题ServiceLevelAgreements（SLA）typicallydonotaddress（）

A. Network access and availability
B. Application access and availability
C. Escalation and conflict resolution
D. Headcounts and budgets