diff --git a/2_using_the_ifb_cloud.md b/2_using_the_ifb_cloud.md
index 8ee1f31559d9bc759724007b463efd2974734905..176e3df7761c624d48a9ec618e7dd44c09e4cb28 100644
--- a/2_using_the_ifb_cloud.md
+++ b/2_using_the_ifb_cloud.md
@@ -5,7 +5,7 @@ title: IFB (Institu Français de bio-informatique) Cloud
 
 # IFB (Institu Français de bio-informatique) Cloud
 
-[! [cc_by_sa](./img/cc_by_sa.png)] (http://creativecommons.org/licenses/by-sa/4.0/)
+[![cc_by_sa](./img/cc_by_sa.png)](http://creativecommons.org/licenses/by-sa/4.0/)
 
 Objective: Start and connect to an appliance on the IFB cloud
 
@@ -13,25 +13,25 @@ Instead of working on your computer where you don't have an Unix-like OS or have
 
 ## Creating an IFB account
 
-1. Access the [**https://biosphere.france-bioinformatique.fr/**](**https://biosphere.france-bioinformatique.fr/**) website
+1. Access the [**https://biosphere.france-bioinformatique.fr/**](https://biosphere.france-bioinformatique.fr/) website
 
 2. On the top right (First) steps with GNU/Linux
 
    Instead of working on your computer where you don't have an Unix-like OS or have limited right, we are going to use the [IFB (Institu Français de bio-informatique) Cloud]( https://biosphere.france-bioinformatique.fr/). For this you will need:
 
-   1. Access the [**https://biosphere.france-bioinformatique.fr/**](**https://biosphere.france-bioinformatique.fr/**) website
-   2. On the top right of the screen click on <img src="/Users/laurent/Documents/formations/2020_08_UNIX/img/signin_ifb.png" alt="sign in" style="zoom:150%;" />
-   3. Then click on ![login](/Users/laurent/Documents/formations/2020_08_UNIX/img/login_ifb.png)
+   1. Access the [**https://biosphere.france-bioinformatique.fr/**](https://biosphere.france-bioinformatique.fr/) website
+   2. On the top right of the screen click on <img src="./img/signin_ifb.png" alt="sign in" style="zoom:150%;" />
+   3. Then click on ![login](./img/login_ifb.png)
    4. Use the **Incremental search field** to select your identity provider (CNRS / ENS de Lyon / etc.)
    5. Login
    6. Complete the form with your **Name**, **First Name**, **Town** and **Zip Code**. You can ignore the other field and click on **accept**.
-   7. Go to your **Groups** parameters on the top right ![group_selection_ifb](/Users/laurent/Documents/formations/2020_08_UNIX/img/group_selection_ifb.png)
-   8. Click on ![join_a_group](/Users/laurent/Documents/formations/2020_08_UNIX/img/join_a_group.png) and type **LBMC Unix 2020**
+   7. Go to your **Groups** parameters on the top right ![group_selection_ifb](./img/group_selection_ifb.png)
+   8. Click on ![join_a_group](./img/join_a_group.png) and type **LBMC Unix 2020**
    9. You can click on the **+** sign to register and wait to be accepted in the group
 
 ## Starting the LBMC Unix 2020 appliance
 
-To follow this practical you will need to start the **[LBMC Unix 2020](https://biosphere.france-bioinformatique.fr/catalogue/appliance/177/) ** appliance from the [IFB Cloud](https://biosphere.france-bioinformatique.fr/) and click on the ![start](/Users/laurent/Documents/formations/2020_08_UNIX/img/start_VM.png) button after login with your account.
+To follow this practical you will need to start the **[LBMC Unix 2020](https://biosphere.france-bioinformatique.fr/catalogue/appliance/177/) ** appliance from the [IFB Cloud](https://biosphere.france-bioinformatique.fr/) and click on the ![start](./img/start_VM.png) button after login with your account.
 
 In the IFB jargon, appliance means **virtual machine** (VM). Remember how a universal Turing machine can run any programs ? A virtual machine, is a simulation program, simulating a physical computer. VM's have the following advantages:
 
@@ -41,27 +41,27 @@ In the IFB jargon, appliance means **virtual machine** (VM). Remember how a univ
 
 To access to your appliance you can go to the [**myVM** tab](https://biosphere.france-bioinformatique.fr/cloud/)
 
-![myVM tab](/Users/laurent/Documents/formations/2020_08_UNIX/img/my_VM_ifb.png)
+![myVM tab](./img/my_VM_ifb.png)
 
 You will see the list of your running or starting appliances.
 
-![my appliances](/Users/laurent/Documents/formations/2020_08_UNIX/img/my_appliances_ifb.png)
+![my appliances](./img/my_appliances_ifb.png)
 
-**Don't forget to terminate your appliances at the end of the session by clicking on** ![rm my appliances ifb.](/Users/laurent/Documents/formations/2020_08_UNIX/img/rm_my_appliances_ifb.png)
+**Don't forget to terminate your appliances at the end of the session by clicking on** ![rm my appliances ifb.](./img/rm_my_appliances_ifb.png)
 
 You will need to start this appliance at the start of each session of this course and terminate it afterward.
 
-The ![hourglass](/Users/laurent/Documents/formations/2020_08_UNIX/img/wait_my_appliances_ifb.png) symbol indicates that your appliance is starting.
+The ![hourglass](./img/wait_my_appliances_ifb.png) symbol indicates that your appliance is starting.
 
 ## Accessing the LBMC Unix 2020
 
 You can open the **https** link next to the termination button of your appliance in a new tab. You will have the following message
 
-![ssl warning](/Users/laurent/Documents/formations/2020_08_UNIX/img/ssl_warning.png)
+![ssl warning](./img/ssl_warning.png)
 
 This means that the https connection is encrypted with a certificate unknown to your browser. As this certificate is going to be destroyed when you terminate your appliance, we don't want to pay a certification authority to validate it. Therefore you can safely add an exception for this certificate.
 
-![ssl exception](/Users/laurent/Documents/formations/2020_08_UNIX/img/ssl_exception.png)
+![ssl exception](./img/ssl_exception.png)
 
 
 
@@ -83,7 +83,7 @@ Password:
 
 To copy / paste your password, you will need to perform a right-click and select **past from the browser.**
 
-![past from browser](/Users/laurent/Documents/formations/2020_08_UNIX/img/shellinabox_past_from_browser.png)
+![past from browser](./img/shellinabox_past_from_browser.png)
 
 Then paste your password in the dialog box.