How to pass variables from awk to shell command?


Vahid Mirjalili

I'm trying to run a shell command from awk for each line of a file that requires an input parameter. I tried to use system()but the input parameter is not recognized.

Each line of this file is the address of a file that I want to run a command to process. So, for a simple example, I want to use the "wc" command for each line and pass $1to wc.

awk '{system("wc $1")}' myfile
Kent

you are close. You have to concatenate the command line with the awk variable:

awk '{system("wc "$1)}' myfile

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