单项选择题

A system administrator is monitoring a system that has recently shown a decrease in performance.The administrator suspects that the system may be low on memory and may be paging excessively.Which of the following commands is best to identify a possible paging problem？（）

A.iostat
B.netstat
C.ps
D.vmstat

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单项选择题

What command should a system administrator run after using an editor to create the /etc/tunables/nextboot file？（）

A.ksh -n nextboot
B.tunsave -a -f nextboot
C.tuncheck -r -f nextboot
D.diff $（vmtune） /etc/tunables/nextboot

单项选择题

What stanza file does a system administrator view to determine what kernel-tuning parameter changes were made when the system was last booted？（）

A./etc/rc.net
B./etc/tunables/tuning
C./etc/tunables/lastboot
D./usr/samples/kernel/nextboot

单项选择题

An administrator attempted to run a sar -u report and received the following error：
sar： 0551-201 Cannot open /var/adm/sa/sa07.
Which of the following should be scheduled in adm’s crontab to obtain sar reports？（）

A.sa1
B.sar
C.vmtune
D.schedtune