[CentOS] sed question

On Tue, Aug 25, 2015 at 1:50 PM, Jerry Geis <geisj at pagestation.com> wrote:
> I am trying to use sed to change a value in a pipe.
>
> ------------------- This is the two line script
> CHANGE="1234"
>
> cat my_file.txt | sed 's/CANCELID/$CHANGE/' > cancel.txt
> -------------------
>
> and the my_file.txt has:
>          <v1:notificationId>CANCELID</v1:notificationId>
>
> it gets changed to $CHANGE instead of the actual value 1234 .
> I tried putting a \ in front of the $ also and made no difference.
>
> What am I not doing correctly.

You need to use double quotes:

cat my_file.txt | sed "s/CANCELID/$CHANGE/" > cancel.txt