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linux - Overwrite input file using awk

I have the following line of code:

awk -F, '{printf "%09d,%d
" ,$1,$2}' $newDir/$processNew

and it does what I want it to, but instead of overwriting the current file, it prints out of screen.

What do I need to change to overwrite the current input file which is $processNew ?

Thanks.

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If you want to override the source file, you need to use a temporary file file:

awk -F, '{printf "%09d,%d
" ,$1,$2}' $newDir/$processNew > tmp && mv tmp $newDir/$processNew

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