In some cases, when you use grep, it is helpful to enter the character pattern you are trying to find in single or double quotes. Why?
What will be an ideal response?
This is true when you are looking for two or more words, so that the words can be distinguished from a file, as in the command: grep ‘red hat' operating_system. In this example,‘red hat' is the character pattern and operating_system is the file you are searching. If you enter red hat without quotes you are likely to get an error because grep interprets hat as a file name.
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a. Leg
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c. Face
d. Toe
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____ ventilation provides equal parts supply and exhaust air through the use of fans.
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