Using the Stream Editor (sed) with Bash variables

I've got a shell script to setup IBM HTTP Server (IHS), which includes a question: -

if [ -z "$1" ]

  then

    echo "For what product are you creating this ?"

    exit 1

fi

 and then uses the Stream Editor (sed) to use this variable : -

sed -i'''s/PidFile\ logs/PidFile\ ${Product}\/logs/g' /opt/ibm/HTTPServer/${Product}/conf/httpd.conf

sed -i'''s/ErrorLog\ logs/ErrorLog\ ${Product}\/logs/g' /opt/ibm/HTTPServer/${Product}/conf/httpd.conf

sed -i'''s/CustomLog\ logs/CustomLog\ ${Product}\/logs/g' /opt/ibm/HTTPServer/${Product}/conf/httpd.conf

Sadly, this didn't quite work ....

Instead, I ended up with this: -

PidFile ${Product}/logs/httpd.pid

rather than this: -

PidFile WAS/logs/httpd.pid

 Thankfully, it was a quick fix - I just needed to change my Bash script to this: -

sed -i''"s/PidFile\ logs/PidFile\ ${Product}\/logs/g" /opt/ibm/HTTPServer/${Product}/conf/httpd.conf

sed -i''"s/ErrorLog\ logs/ErrorLog\ ${Product}\/logs/g" /opt/ibm/HTTPServer/${Product}/conf/httpd.conf

sed -i''"s/CustomLog\ logs/CustomLog\ ${Product}\/logs/g" /opt/ibm/HTTPServer/${Product}/conf/httpd.conf

In other words, I replaced the single quotes around the s/from/to/g section of the Sed script with double quotes ....

Thanks to this: -

How do I use variables in a sed command?

for inspiration.