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27 lines
806 B
Markdown
27 lines
806 B
Markdown
# awk
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> A versatile programming language for working on files.
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- Print the fifth column (a.k.a. field) in a space-separated file:
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`awk '{print $5}' {{filename}}`
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- Print the second column of the lines containing "something" in a space-separated file:
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`awk '/{{something}}/ {print $2}' {{filename}}`
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- Print the last column of each line in a file, using a comma (instead of space) as a field separator:
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`awk -F ',' '{print $NF}' {{filename}}`
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- Sum the values in the first column of a file and print the total:
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`awk '{s+=$1} END {print s}' {{filename}}`
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- Sum the values in the first column and pretty-print the values and then the total:
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`awk '{s+=$1; print $1} END {print "--------"; print s}' {{filename}}`
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- Print every third line starting from the first line:
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`awk 'NR%3==1' {{filename}}`
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