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e4114fa6cc
tldr/pages/common/awk.md
Srinivasan R e4114fa6cc Normalize the final new line 
Fixes #310
Some files had no newlines, some had 1 newline and some more than 1 newline.
Normalize them all to have only 1 newline at the end of all files.
2015-10-28 14:03:06 +05:30

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awk

A versatile programming language for working on files

  • Print the fifth column in a space separated file

awk '{print $5}' {{filename}}

  • Print the third column in a comma separated file

awk -F ',' '{print $3}' {{filename}}

  • Sum the values in the first column and print the total

awk '{s+=$1} END {print s}' {{filename}}

  • Sum the values in the first column and pretty-print the values and then the total

awk '{s+=$1; print $1} END {print "--------"; print s}' {{filename}}