Hey there,

Glad to help

You should be all right with that, just be sure to escape your shell special character when you echo:

echo "s/$word/$in/g" >> filename2

would end up echoing the value of your variables into your sed script.

echo "s/\$word/\$in/g" >> filename2

should take care of that

, Mike

Thanks again for replying. I would not have bothered you again, but the syntax seems to be missing something on my end.
sed -f "filename2" "originalfile"
Doing so does not apply the output of filename2 to the original file. Strangely, when I use sed without -n option, it displays the output correctly on stdout, however, same does not apply to the file when I takeoff -n. Any thing you may suggest to fix this !
Thanks and I appreciate all your help.

Hey,

The important thing is that you're making forward progress!

For the -n flag, you're instructing sed not to print anything - which is good when you don't want to print every single line of your file. So, it kind of works like a "grep" in the sense that, if you end your sed statement with the "p" flag and use -n, you will only print the lines that match.

So, for instance:

would only print the lines from "filename" that matched the regular expression HELLO.

I think if you just add the p to the end of your expression (works on straight-up match operator, like above, and at the end of a substitute, like you're doing (e.g. sed -n 's/this/that/p' FILE)

Best wishes,

Mike