diff --git a/pages/AcmeTinyUbuntu.md b/pages/AcmeTinyUbuntu.md
index af97f0b..bffb02e 100644
--- a/pages/AcmeTinyUbuntu.md
+++ b/pages/AcmeTinyUbuntu.md
@@ -149,7 +149,7 @@ DEFAULT_CA = "https://acme-staging.api.letsencrypt.org"
 When it all works, then you can go for real.
 
 ```
-#!/bin/sh -x
+#!/bin/sh -xe
 
 umask 0022
 H=/home/acme