Re: How to pass UNIX variable into awk?

On 8 Apr., 17:19, pk <p...@[EMAIL PROTECTED]
> wrote:
> RC wrote:
> > myvariable="hello"
>
> > cat my file, if first field match "hello", then print whole line
>
> awk '$1 ~ /hello/' myfile.txt
>
> > I tried
>
> > cat myfile.txt | awk -F: '$1 ~ /$myvariable/ {print $0}'
>
> > but doesn't work, I also tried double $ like $1 ~ /$$myvariable/
> > still no luck.
>
> > I did this more than 10 years ago, now I forget the trick.
> > If you know, please tell me again.
> > Thank Q in advance!
>
> awk -v myvar="hello" '$1 ~ myvar' myfile.txt

Or (if exact match is required instead of substring match)...

  awk -v myvar="hello" '$1==myvar' myfile.txt


Janis