From 3615219c4cc0b7f69d7aeb16759f434cdae14f63 Mon Sep 17 00:00:00 2001
From: Peter Barker <pbarker@barker.dropbear.id.au>
Date: Wed, 16 May 2018 08:35:54 +1000
Subject: [PATCH] Tools: install-prereqs-ubuntu: correct check for realpath

---
 Tools/scripts/install-prereqs-ubuntu.sh | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/Tools/scripts/install-prereqs-ubuntu.sh b/Tools/scripts/install-prereqs-ubuntu.sh
index f456cb9f98..e253da4aa3 100755
--- a/Tools/scripts/install-prereqs-ubuntu.sh
+++ b/Tools/scripts/install-prereqs-ubuntu.sh
@@ -86,7 +86,8 @@ else
     SITL_PKGS+=" python-wxgtk2.8"
 fi
 
-if apt-cache search realpath; then
+RP=$(apt-cache search -n '^realpath$')
+if -n "$RP"; then
     SITL_PKGS+=" realpath"
 fi