upload-processor.md

@@ -14,10 +14,14 @@ Other script languages can be supported, please contact us if you have a specifi
 In a first step, we start with a very basic shell script which adds two integers and returns the result in a text file. This example illustrates how the integration mechanism works.
 
 The shell script is the following:
+
 ![im33](https://gitlab.acri-cwa.fr/coastal-tep/tutorial/raw/master/images/part4/im33.png)
 
+Notice that it has two input variables `$1` and `$2` and that output results are placed in the `CTEP_OUTPUT_DIR` folder. The last point is important: this will allow the CTEP to know where to retrieve the processing results.
+
+To upload the processor, create a targz archive with this file. Assuming the file is called `proc1.sh`, the command is
+`tar cvzf proc1.tar.gz proc1.sh`.
 
-2.     Compress your file (tar.gz)
 3.     Go to the geobrowser and login with your ESA SSO account: [https://coastal-tep.eo.esa.int/geobrowser/](https://coastal-tep.eo.esa.int/geobrowser/).
 4.     Go to the uploading processor interface [https://coastal-tep.eo.esa.int/wps/ui/#/](https://coastal-tep.eo.esa.int/wps/ui/#) and click on the New button.
 ![im56](https://gitlab.acri-cwa.fr/coastal-tep/tutorial/raw/master/images/part4/im56.png)