Note: The following is a problem for source, cd, ls etc. when the command is inside an execute bash file versus type directory into termnial:

Note: The file was originally created in Windows, but edited using Xcode on Mac:

so I have file test.sh

Contains

#!/bin/bash
cd "/usr/bin/"

I call like this in terminal:

source test.sh

Gives error

test.sh:cd:2: no such file or directory: /usr/bin/^M

I have tried just about everything I can think of…