Discussion
Consider the following UNIX command : sort \(\lt\)in\(\gt\) temp; head - 30 \(\lt\)temp; rm temp Which of the following functions shall be performed by this command ?
Answer: C
The command sort <in> temp; head -30 <temp; rm temp has three parts. The first sorts, taking its input from the file in and writing its output to the file temp. The second, head -30 <temp, reads temp and prints its first 30 lines on the terminal. The third removes the file temp. That is option (C). Options (A) and (D) say the sort reads from temp, whereas temp is the output of the first command, and (B) says the 30 lines are removed from temp instead of being printed, which head does not do.
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