From 36f930fc2f5dd75148d7475aef51538d0644738d Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?=C3=89mile=20Morel?= <github@bleuchtang.fr>
Date: Fri, 21 Aug 2015 14:50:09 +0200
Subject: [PATCH] add -q to grep

---
 scripts/install | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/scripts/install b/scripts/install
index 1756a8a..2a8393a 100644
--- a/scripts/install
+++ b/scripts/install
@@ -78,7 +78,7 @@ export DEBIAN_FRONTEND=noninteractive
 # Based on https://wiki.debian.org/WiFi#USB_Devices
 if [ "${firmware_nonfree}" == yes ]; then
   # check if non-free is set on sources.list
-  if ! grep non-free /etc/apt/sources.list ; then
+  if ! grep -q non-free /etc/apt/sources.list ; then
     sed -i -e '0,/main/{s/main/main non-free/}' /etc/apt/sources.list
     apt-get update
   fi