单项选择题

A system administrator has a server that is performing poorly. The vmstat command identifies that high CPU usage is the problem. Which of the following commands can be used to identify the eight most active processes running on the server？（）

A.ps -ef -t8
B.sar -u -p 8
C.vmstat -t 8
D.topas -p8 -n0 -d0

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单项选择题

A system administrator is unable to unmount a file system. Which is the appropriate command to determine who or what is accessing the file system？（）

A.who /filesystem
B.lsfs /filesystem
C.fuser /filesystem
D.umount -f /filesystem

单项选择题

A system administrator wants to configure a system so that all new users will be put into the database group by default. How would this be accomplished？（）

A.remove all other groups from the system
B.run the command mkuser -default "GROUP=database"
C.change the default group in /usr/lib/security/mkuser.default
D.edit /etc/security/group to move all users to the database stanza

单项选择题

A system administrator would like to modify the system default user characteristics so that each new user will now be assigned （by default） the csh shell rather than the ksh shell. Which of the following actions should be performed？（）

A.Run the command chlogin -shell "csh"
B.Run the command mkuser -default "SHELL=csh"
C.Edit /etc/passwd and change all "ksh" entries to "csh"
D.Modify the contents of /usr/lib/security/mkuser.default file