diff --git a/1_understanding_a_computer.Rmd b/1_understanding_a_computer.Rmd
index d011e3f569b1c6b300b3055fb7359f86fbb42da1..2e03d5448962032714c9f941f875fd005a73f441 100644
--- a/1_understanding_a_computer.Rmd
+++ b/1_understanding_a_computer.Rmd
@@ -160,5 +160,7 @@ You can find a [list of software licenses](https://www.gnu.org/licenses/license-
   Your browser does not support the video tag.
 </video>
 
+See this [presentation](https://plmlab.math.cnrs.fr/gdurif/presentation_foss/-/blob/main/presentation/presentation_DURIF_foss.pdf) (in french) for a quick introduction about **software license** and **free/open source software**.
+
 
 [Instead of installing GNU/Linux on your computer, you are going to learn to use the IFB Cloud.](./2_using_the_ifb_cloud.html)
diff --git a/2_using_the_ifb_cloud.Rmd b/2_using_the_ifb_cloud.Rmd
index b4e1b08345ded12ac8ecb3de964bc2da7688b98d..8a6c5a52c2d78de8a673f630e5b9c768868d4dbc 100644
--- a/2_using_the_ifb_cloud.Rmd
+++ b/2_using_the_ifb_cloud.Rmd
@@ -1,5 +1,5 @@
 ---
-title: IFB (Institu Français de bio-informatique) Cloud
+title: IFB (Institut Français de bio-informatique) Cloud
 author: "Laurent Modolo"
 output:
   rmdformats::downcute:
@@ -38,7 +38,7 @@ klippy::klippy(
 
 Objective: Start and connect to an appliance on the IFB cloud
 
-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/).
+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 (Institut Français de bio-informatique) Cloud]( https://biosphere.france-bioinformatique.fr/).
 
 # Creating an IFB account
 
@@ -46,7 +46,7 @@ Instead of working on your computer where you don't have an Unix-like OS or have
 
 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:
+   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 (Institut 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="./img/signin_ifb.png" alt="sign in" style="zoom:150%;" />