diff --git a/2.Common_services/7.letsencrypt/0_setup.sh b/2.Common_services/7.letsencrypt/0_setup.sh
index d49c83cccd80284c4e608b0c0666fd93bb1c42ab..d74d25c1fb7e7486fdefadcbb69d4b3972ded291 100644
--- a/2.Common_services/7.letsencrypt/0_setup.sh
+++ b/2.Common_services/7.letsencrypt/0_setup.sh
@@ -1,3 +1,20 @@
+#!/bin/bash
+# automate letsencrypt certificate generation and authentication
+# Copyright (C) 1993-2993 Hugo Mangeart
+
+# This program is free software: you can redistribute it and/or modify
+# it under the terms of the GNU General Public License as published by
+# the Free Software Foundation, either version 3 of the License, or
+# (at your option) any later version.
+
+# This program is distributed in the hope that it will be useful,
+# but WITHOUT ANY WARRANTY; without even the implied warranty of
+# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+# GNU General Public License for more details.
+
+# You should have received a copy of the GNU General Public License
+# along with this program.  If not, see <http://www.gnu.org/licenses/>.
+
 trap "cp /tmp/{mediaserver-msuser.conf,skyreach.conf,msmonitor.conf} /etc/nginx/sites-available/; exit 255" ERR
 source /root/envsetup/global-conf.sh
 LE_DIR="/etc/letsencrypt/live/"