diff --git a/docker/README.md b/docker/README.md
index 4dec63b94..0c136f94c 100644
--- a/docker/README.md
+++ b/docker/README.md
@@ -3,14 +3,19 @@
 Build all docker images, in order:
 
 ```bash
-(cd ubuntu-boost-tbb && exec build.sh)
-(cd ubuntu-gtsam && exec build.sh)
-(cd ubuntu-gtsam-python && exec build.sh)
-(cd ubuntu-gtsam-python-vnc && exec build.sh)
+(cd ubuntu-boost-tbb && ./build.sh)
+(cd ubuntu-gtsam && ./build.sh)
+(cd ubuntu-gtsam-python && ./build.sh)
+(cd ubuntu-gtsam-python-vnc && ./build.sh)
 ```
 
 Then launch with: 
 
-    docker run dellaert/ubuntu-gtsam-python-vnc:bionic
+    docker run -p 5900:5900 dellaert/ubuntu-gtsam-python-vnc:bionic
+
+Then open a remote VNC X client, for example:
+
+    sudo apt-get install tigervnc-viewer
+    xtigervncviewer :5900