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→Using the awk Utility
'''Examples:'''
<span style="font-family:courier;">'''awk 'NR == 3 {print}' text.txt''' (print 3rd line)<br>'''awk 'NR >= 1 && NR <= 5 {print}' text.txt''' (print lines 1 to 5)<br>'''awk '/NOTE:/ {print]' text.txt''' (print lines that contain the pattern: "NOTE:")<br><br>'''awk -F";" '$1 ~ /ford/ {print}' cars.dat''' (print records (of semi-colon delimited file) whose 1st field matches: "ford")<br>'''awk -F";" '$1 ~ /ford/ {print $2,$4}' cars.dat''' (same as above, but only print second 2nd and fourth 4th fields of records (of semi-colon delimited file) whose 1st field matches: "ford")<br><br></span>
=INVESTIGATION 1: USING THE SED UTILITY=