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43 lines
1.2 KiB
Markdown
43 lines
1.2 KiB
Markdown
# `awk`
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## Table of contents <!-- omit in toc -->
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1. [TL;DR](#tldr)
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1. [Further readings](#further-readings)
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## TL;DR
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```sh
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# Print only the 3rd column.
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awk '{print $3}' sales.txt
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cat sales.txt | awk '{print $3}'
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# Print the 2nd and 3rd columns, separated with a comma.
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awk '{print $2 ", " $3}' sales.txt
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cat sales.txt | awk '{print $2 ", " $3}'
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# Print the sum of the 2nd and 3rd columns.
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awk '{print $2 + $3}' sales.txt
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# Print only lines with a length of more than 20 characters.
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awk 'length($0) > 20' sales.txt
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# Print only lines where the value of the second column is greater than 100.
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awk '$2 > 100' sales.txt
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```
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## Further readings
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- [Print line only if number in third field is greater than X]
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- [Printing the last column of a line in a file]
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- [The essential Bash cheat sheet]
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<!--
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References
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-->
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<!-- Others -->
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[print line only if number in third field is greater than x]: https://unix.stackexchange.com/questions/395588/print-line-only-if-number-in-third-field-is-greater-than-x#395593
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[printing the last column of a line in a file]: https://stackoverflow.com/questions/13046167/printing-the-last-column-of-a-line-in-a-file#13046224
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[the essential bash cheat sheet]: https://betterprogramming.pub/the-essential-bash-cheat-sheet-e1c3df06560
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