Whichofthefollowingcommandsshouldbeusedtoclearallentrie……

单项选择题While a user is compiling a C program,  vmstat 120 10  is run to determine the cause of a performance problem.  Using the vmstat output as shown in the exhibit, which of the following conclusions is most appropriate to draw?（）

A. There is a file I/O bottleneck.
B. There are too many open files. 
C. There appears to be a buffer shortage. 
D. There is a paging space I/O bottleneck. 

单项选择题Whenplanningtoaccesstheon-linedocumentationfromaremoteclient,whichofthefollowingproceduresshouldbeperformedontheserver?（）

A.Install and configure the HTTPServer. 
B.Add the name(s) of the client(s) to the httplite.conf file. 
C.Add the names of any clients expecting to access the documentation to the /etc/hosts file. 
D.No action is required.

单项选择题Whichofthefollowingproceduresshouldbeperformedtominimizepossibleproblemsforacustomerwhenupdatingsoftware?（）

A.Apply the updates without committing.
B.Commit the new updates to be certain there is no change after the next reboot.
C.Update one fileset at a time and test to ensure that it works before updating the next fileset.
D.No action is necessary since the software can always be uninstalled and re-installed.

单项选择题Whereisthershloglocated?（）

A. /var/spool 
B. /var/perf 
C. /var 
D. /var/adm

单项选择题To examine the Exhibit, press the Exhibit button. The exhibit shows the output of netstat -nr.  Which of the following addresses will require an additional route entry? （）

A. 129.35.54.22 
B. 129.35.56.35 
C. 129.35.57.22 
D. 129.35.1.22