Executing bash bash script from emacs / elisp

[Rainer M Krug]

Hi
I am a complete beginner concerning elisp - so please bear with me if
this is a simple question.

I would like to execute a shell (bash) script from elisp, which is then
called from org-babel to do some post-processing of the result of
tangling. Tangling in org-babel has a hook for post-processing, and I
know how to set it. Therefore I am simply looking for a way of executing
my shell script from that hook.

essentially:

this-function-executes-a-shell-script(The_Shell_Script.sh)

Thanks,
Rainer