单项选择题
A. errpt -d S 0
B. errclear 0
C. errpt -d H 0
D. errclear -d H 0
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?（）
单项选择题 Whenplanningtoaccesstheon-linedocumentationfromaremoteclient,whichofthefollowingproceduresshouldbeperformedontheserver?（）
单项选择题 Whichofthefollowingproceduresshouldbeperformedtominimizepossibleproblemsforacustomerwhenupdatingsoftware?（）