单项选择题

A 1500 page print job was sent to the "pcl" queue. The job was running for several minutes before it was determined that the job was not needed. What can be done to delete the job？（）

A.kill 201
B.cancel 201
C.disable pcl
D.rm /var/spool/lpd/STDIN.27648

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单项选择题

Given the following scripts， what output would be generated？（）

A.The sky is red.
B.The sky is blue.
C.The sky is green.
D.The sky is yellow.

单项选择题

Given the following scripts， both found in /usr/local/bin， what would the output be when executing /usr/local/bin/script1？（）

A.dog cat
B.dog fish
C.mouse cat
D.mouse fish

单项选择题

A.chmod +s /tmp
B.chmod 775 /tmp
C.chmod 1777 /tmp
D.chmod 4755 /tmp