Fix shell commands behavior in actions (#9057)

docs/user_manual/working_with_vector/vector_properties.rst

@@ -2912,6 +2912,9 @@ that was selected from the identify results or attribute table (see :ref:`using_
 Double quote marks can be used to group text into a single argument to the program, script or command.
 Double quotes will be ignored if preceded by a backslash.
 
+Actions can invoke a single process, with arguments, so booleen operators (such as ``&``, ``&&``, ``;``, ``|``) will not work.
+In UNIX-like operating systems multiple commands can be executed via ``bash -c``.
+
 The :guilabel:`Action Scopes` allows you to define where the action should be available.
 You have following choices: