Parse logs generated by Ksh script

Elastic Stack Logstash
1

Hello everyone,
I'm just beginning with ELK . I have a custom logs generated by Ksh Script (see Below) and I want is possible to exctact specific lines from it like (Comment,Start Date,End Date )
Perhaps should I use Grok Filter but I dont know how to process with it .

Thanks in davance

Program : Script_Test
Start Date : 23/06/2019_05:10:37

Liste des fichiers a la fin
-rw-r--r-- 1 svdr users 12335014 Jun 23 05:10 /appli/svdr/P/data/ACGA/Base_PRODUITS.CSV
-rw-r--r-- 1 svdr users 33661501 Jun 23 05:10 /appli/svdr/P/data/ACGA/KE24_Livraison.CSV
-rw-r--r-- 1 svdr users 62503 Jun 23 05:10 /appli/svdr/P/data/ACGA/ZC75.CSV
-rw-r--r-- 1 svdr users 17327587 Jun 23 05:10 /appli/svdr/P/data/ACGA/ZM36_products.CSV
Les fichiers extraits ANALYTICS CG AFRIQUE ont ete archivees, compresse et deplacees vers => /appli/svdr/P/transfert/Emis/ACGA_20190623-051037.tar.gz

Fin d'execution du script.

Program : ACGA_Extract
Comment : FIN_OK
Start Date : 23/06/2019_05:10:37
End Date : 23/06/2019_05:10:47
Return Code : 0

2

you can refer the url :http://grokdebug.herokuapp.com/patterns#

also to start with grok I would suggest to go with existing grok filter example

additionally you can write your own custom filter logic using various pattern options