diff --git a/install_opencv.sh b/install_opencv.sh
index 799fa08..d948d13 100755
--- a/install_opencv.sh
+++ b/install_opencv.sh
@@ -1,5 +1,7 @@
 #!/bin/bash
 
+set -x # commands
+
 OPENCV_VERSION="3.1.0"
 
 echo "Downloading OpenCV..."