source command not found in sh shell

Question

I have a script that uses sh shell. I get an error in the line that uses the source command. It seems source is not included in my

Answer 1

$ls -l `which sh`
/bin/sh -> dash

$sudo dpkg-reconfigure dash #Select "no" when you're asked
[...]

$ls -l `which sh`
/bin/sh -> bash

Then it will be OK