diff --git a/doc/source/guides/multinode-lab.rst b/doc/source/guides/multinode-lab.rst
index 79a76de..658422b 100644
--- a/doc/source/guides/multinode-lab.rst
+++ b/doc/source/guides/multinode-lab.rst
@@ -89,7 +89,7 @@
 
 ::
 
-    echo "stack ALL=(ALL) NOPASSWD: ALL" >> /etc/sudoers
+    echo "stack ALL=(ALL) NOPASSWD: ALL" | sudo tee /etc/sudoers.d/stack
 
 From here on use the ``stack`` user. **Logout** and **login** as the
 ``stack`` user.