Which of the following can be used to show which processes are using most of the CPU or memory resources on your system:
A. most
B. big
C. lots
D. top
查看答案
Your shell script needs to test to see if a directory, document, exists; a way to do this is:
A. [ -h document ]
B. [ document –gt 0 ]
C. [ -d document ]
D. [ -s document ]
Your shell script uses an "if" statement to see if the word "yes" was entered. This "if" statement looks like:
A. if ( $RESPONSE = "yes" ) ; then
B. if [ RESPONSE = "yes" ) ; then
C. if [ $RESPONSE == "yes" ] ; then
D. if ( RESPONSE = "yes" ) ; then
Why should we use shell scripts?
A. They combine long, possibly repetitive commands into one simple command
B. They allow you to create new commands and share these procedures among several users
C. They automate tasks and reduce risk of errors
D. All of the above
Which of following could you use to check the status of all your printers?
A. status –a
B. lp status –all
C. lprm my-printers
D. lpstat –a
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