Which of the following can be used to insert a new line below the current line inside a vi session?（）

单项选择题An operator is asked to rewind and eject a tape from a system. Which command will accomplish this without touching the tape drive?（）

A. tctl reset
B. tctl rewind
C. tctl return
D. tctl rewoffl

单项选择题When an operator is trying to log off the system displays this message: you have running jobs?? What does this mean?（）

A. One or more processes are running in the background, preventing log off.
B. One or more processes are paused, requiring operator input prior to logging off.
C. At least one process is running in the background and it will keep running after the operator logs off
D. At least one process is running in the background using nohup and it will terminate when the operator logs off

单项选择题An application owner wants to grant write permission to all users for all the files and directories in the application directory. Which of the following is the correct command?（）

A. chmod -R u+rw /application
B. chmod -r u+rw /application
C. chmod -R o+rw /application
D. chmod -r o+rw /application

单项选择题The operator needs to change the test filesystem in the testvg volume group so that it mounts automatically following a system reboot. Which of the following commands is correct?（）

A. chvg -a y testvg
B. chfs -A yes /test
C. mount /test -auto=yes
D. chlv -a automount=y testlv

单项选择题The operator needs to execute a long-running shell script. How can the script be executed so the operator does not have to wait until it is complete to access the command prompt?（）

A. ./script.ksh
B. nohup ./script.ksh
C. run -b ./script.ksh
D. ./script.ksh > nohup.out