diff --git a/README.md b/README.md
index 8218927..3fe3f52 100644
--- a/README.md
+++ b/README.md
@@ -22,3 +22,13 @@ Nodes are configured from 10.10.0.100 and above
 dhcp range is 10.10.1.1-10.10.1.250
 
 
+
+## useful commands
+
+```
+for i in `seq 136 142`; do ssh root@10.10.0.$i reboot; done
+for i in `seq 100 142`; do ssh root@10.10.0.$i "sh -c 'nohup stress -c 8 > /dev/null 2>&1 &'"; done
+
+
+ansible-playbook  -i inventory site.yml --limit "node42" --tags "hostname,telegraf" -K --ask-pass
+```
\ No newline at end of file
diff --git a/ansible-ctdo/roles/test/tasks/main.yml b/ansible-ctdo/roles/test/tasks/main.yml
deleted file mode 100644
index 041a5f6..0000000
--- a/ansible-ctdo/roles/test/tasks/main.yml
+++ /dev/null
@@ -1,4 +0,0 @@
-- name: host
-  debug: msg="{{ item }}"
-  with_items:
-    - "{{ groups['nodes'].ansible_host }}"
\ No newline at end of file
diff --git a/ansible-ctdo/site.yml b/ansible-ctdo/site.yml
index fc8af78..99816a0 100644
--- a/ansible-ctdo/site.yml
+++ b/ansible-ctdo/site.yml
@@ -4,7 +4,6 @@
     - { role: base, tags: 'base' }
     - { role: authkeys, tags: 'authkeys', group: 'admins' }
     - { role: dj-wasabi.telegraf, tags: 'telegraf', become: yes }
-    - { role: test, tags: 'test' }
   remote_user: debian
   become_method: su
   become: true