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diff --git a/docs/ubuntu-installation.md b/docs/ubuntu-installation.md
index 9799cadf..3acb7364 100644
--- a/docs/ubuntu-installation.md
+++ b/docs/ubuntu-installation.md
@@ -6,21 +6,20 @@ Download and boot the [last Ubuntu release](http://releases.ubuntu.com/19.04/ubu
 
 Follow the steps :
 
-![img1](https://user-images.githubusercontent.com/32063953/56804679-85867580-681e-11e9-8965-e87c6a89fac0.png)
-![img2](https://user-images.githubusercontent.com/32063953/56963599-3eb3bb00-6b51-11e9-9778-4f3bb9993c74.png)
-![img3](https://user-images.githubusercontent.com/32063953/56963600-3eb3bb00-6b51-11e9-94cc-279406f37def.png)
+![img1](img/1.png)
+![img2](img/2.png)
+![img3](img/3.png)
 
 The partitioning is :
 
-- 256 MB : EFI partition
-- 20 GB : system partition
-- 32 GB : unused partition (will be used later)
-- rest : unused partition (will be used later)
+1) 256 MB : EFI partition
+2) 20 GB : system partition
+3) 32 GB : unused partition (will be used later)
+4) rest : unused partition (will be used later)
 
-![img4](https://user-images.githubusercontent.com/32063953/56963602-3eb3bb00-6b51-11e9-8977-38e4e67d6ce1.png)
-![img5](https://user-images.githubusercontent.com/32063953/56963603-3f4c5180-6b51-11e9-9349-46ab90287691.png)
-![img6](https://user-images.githubusercontent.com/32063953/56963604-3f4c5180-6b51-11e9-8df2-5016771e6e07.png
-)
+![img4](img/4.png)
+![img5](img/5.png)
+![img6](img/6.png)
 
 Remove the installation disk and then reboot.
 
@@ -28,10 +27,16 @@ Skip the welcoming window.
 
 Don't install updates if Ubuntu asks to. The scripts will.
 
-![img8](https://user-images.githubusercontent.com/32063953/56804701-8d461a00-681e-11e9-8825-dfc69f8268bf.png)
-![img9](https://user-images.githubusercontent.com/32063953/56804703-8d461a00-681e-11e9-840c-498ccab7d911.png)
-![img10](https://user-images.githubusercontent.com/32063953/56804704-8ddeb080-681e-11e9-96ff-6c8783c5aacc.png)
-![img11](https://user-images.githubusercontent.com/32063953/56804706-8ddeb080-681e-11e9-85e1-20c5b6956a36.png)
+Start the disk utility to name partitions so that OverlayFS can identify them.
+
+3) 32 GB - **Partition 3** : `01-tmp-home`
+4) rest - **Partition 4** : `01-tmp-system`
+
+The same procedure is required to make USB disk usable for the students, the partition name must be : `01-home`
+
+![img7](img/7.png)
+![img8](img/8.png)
+![img9](img/9.png)
 
 ## OS configuration