diff --git a/scripts/install b/scripts/install
index 994506f..ddd675d 100644
--- a/scripts/install
+++ b/scripts/install
@@ -19,6 +19,12 @@ sudo yunohost app checkport $port
 if [[ ! $? -eq 0 ]]; then
 	exit 1
 fi
+
+#check if su_password is not empty
+if [[ -n $su_passwd ]]; then
+	exit 1
+fi
+
 # Save app settings
 sudo yunohost app setting $app port -v "$port"
 
diff --git a/scripts/remove b/scripts/remove
index 39124bb..3b78f74 100644
--- a/scripts/remove
+++ b/scripts/remove
@@ -1,7 +1,11 @@
 #!/bin/bash
 
 app=mumbleserver
+#getting port used by mumble to close it
 port=$(sudo yunohost app setting $app port)
+#uninstall mumble and its dependencies
 sudo apt-get autoremove -y mumble-server > /dev/null 2>&1
+#close ports
 sudo yunohost firewall disallow Both $port > /dev/null 2>&1
+#removing config file 
 sudo rm -f /etc/mumble-server.ini
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