Question

I know it doesn’t matter what the file extentions are in linux but what is the convention for naming sed scripts? I have seen both .sh, .sed, .sd

Answer 1

Use .sh when the file contains shell commands; use .sed when it has only Sed commands and is loaded by sed -f.

E.g., the following would be called script.sh:

#!/bin/sh
sed 's/foo/bar/g'

While this would be script.sed:

s/foo/bar/g

Editors such as Vim will give you proper highlighting based on .sh and .sed.