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I just want to substract the 2nd column from the first, I did

awk "{ print $1-$2; }"

I get a syntax error. For information, input is piped in from another process.

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1 Answer 1

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Since you’re using double quotes, the shell interprets $1 and $2, replacing them with the first two arguments in the current context (so probably the empty string in both cases, given the error you’re getting). You should use single quotes:

awk '{ print $1-$2; }'
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