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@ -7,6 +7,33 @@ printf '1\n2\n3\n' | awk '{sum += $1} END {print sum}'
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# Using specific character as separator to sum integers from a file or STDIN.
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printf '1:2:3' | awk -F ":" '{print $1+$2+$3}'
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# Print line number 12 of file.txt
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awk 'NR==12' file.txt
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# Print first field for each record in file.txt
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awk '{print $1}' file.txt
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Print only lines that match regex in file.txt
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awk '/regex/' file.txt
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# Print only lines that do not match regex in file.txt
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awk '!/regex/' file.txt
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# Print any line where field 2 is equal to "foo" in file.txt
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awk '$2 == "foo"' file.txt
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# Print lines where field 2 is NOT equal to "foo" in file.txt
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awk '$2 != "foo"' file.txt
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# Print line if field 1 matches regex in file.txt
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awk '$1 ~ /regex/' file.txt
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# Print line if field 1 does NOT match regex in file.txt
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awk '$1 !~ /regex/' file.txt
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# Print lines with more than 80 characters in file.txt
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awk 'length > 80' file.txt
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# Print a multiplication table.
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awk -v RS='' '
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{
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@ -100,3 +127,9 @@ awk '
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}
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}
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' FILE
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# Remove duplicate lines
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awk '!seen[$0]++' file.txt
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# Remove all empty lines
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awk 'NF > 0' file.txt
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