Overwrite input file using awk

Question

I have the following line of code:

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

and it does what I want it to, but instea

Answer 1

With GNU awk, you can do

gawk -i inplace -options 'script' file ...

or

gawk -i inplace -v INPLACE_SUFFIX=.bak -options 'script' file ...

ref: https://www.gnu.org/software/gawk/manual/html_node/Extension-Sample-Inplace.html