diff --git a/rpi_install.bash b/rpi_install.bash
index 50da4f0..07a50b2 100644
--- a/rpi_install.bash
+++ b/rpi_install.bash
@@ -1,3 +1,4 @@
+#!/bin/bash
 # Go through these bash commands one by one
 # Prerequisite is a fresh Ubuntu 20.04 !! 64bit !! OS
 # Only the password was changed after first boot