diff --git a/userdata/README.md b/userdata/README.md
index c31b2e9..6bd2355 100644
--- a/userdata/README.md
+++ b/userdata/README.md
@@ -1,13 +1,18 @@
 # E.G. to boot 20 instances
+
+```bash
 openstack server create --user-data isen-postinstall.sh --min 20 --max 20 --flavor d2-4 --image 'Debian 11' --net Ext-Net --key-name arnaud-choupinette isen
+```
 
 # Then copy/paste openrc files into the servers so that students can do
 # source /root/openrc
 
 # Clean the project, from k8s-1
 
+```bash
 for o in $(ls -1 /root/openrc_is*) ; do 
     source $o
     echo "Working on $o"
     bash /root/bootstrap-openstack-k8s/extra/clean-project.sh
 done
+```