diff --git a/10_network_and_ssh.Rmd b/10_network_and_ssh.Rmd
index 8d40669ccaf9a7274576255abff879f105547c88..eb4ec9395abed7b36d8ef82ed4320bb1bdced9dd 100644
--- a/10_network_and_ssh.Rmd
+++ b/10_network_and_ssh.Rmd
@@ -1,33 +1,15 @@
 ---
 title: SSH
 author: "Laurent Modolo"
-output:
-  rmdformats::downcute:
-    self_contain: true
-    use_bookdown: true
-    default_style: "light"
-    lightbox: true
-    css: "./www/style_Rmd.css"
 ---
 
 ```{r include = FALSE}
-
 if (!require("fontawesome")) {
   install.packages("fontawesome")
 }
-if (!require("klippy")) {
-  install.packages("remotes")
-  remotes::install_github("rlesur/klippy")
-}
 library(fontawesome)
 knitr::opts_chunk$set(echo = TRUE)
 knitr::opts_chunk$set(comment = NA)
-klippy::klippy(
-  position = c("top", "right"),
-  color = "white",
-  tooltip_message = "Click to copy",
-  tooltip_success = "Copied !"
-)
 ```
 
 [![cc_by_sa](./img/cc_by_sa.png)](http://creativecommons.org/licenses/by-sa/4.0/)
diff --git a/11_install_system_programs.Rmd b/11_install_system_programs.Rmd
index 5b57f0634909205e209cbd1ce95040f89a380a0e..b97bd501404d58268e2f6fe05f1970bbeeb82f95 100644
--- a/11_install_system_programs.Rmd
+++ b/11_install_system_programs.Rmd
@@ -1,33 +1,15 @@
 ---
 title: Install system programs
 author: "Laurent Modolo"
-output:
-  rmdformats::downcute:
-    self_contain: true
-    use_bookdown: true
-    default_style: "light"
-    lightbox: true
-    css: "./www/style_Rmd.css"
 ---
 
 ```{r include = FALSE}
-
 if (!require("fontawesome")) {
   install.packages("fontawesome")
 }
-if (!require("klippy")) {
-  install.packages("remotes")
-  remotes::install_github("rlesur/klippy")
-}
 library(fontawesome)
 knitr::opts_chunk$set(echo = TRUE)
 knitr::opts_chunk$set(comment = NA)
-klippy::klippy(
-  position = c('top', 'right'),
-  color = "white",
-  tooltip_message = 'Click to copy',
-  tooltip_success = 'Copied !')
-
 ```
 
 [![cc_by_sa](./img/cc_by_sa.png)](http://creativecommons.org/licenses/by-sa/4.0/)
diff --git a/12_virtualization.Rmd b/12_virtualization.Rmd
index e6e442c55ac844a29a5aa3c7e7b37b7ae0a88062..6eb8b1b5854720837133dfd3fe68201bf7ec4767 100644
--- a/12_virtualization.Rmd
+++ b/12_virtualization.Rmd
@@ -1,33 +1,15 @@
 ---
 title: Virtualization
 author: "Laurent Modolo"
-output:
-  rmdformats::downcute:
-    self_contain: true
-    use_bookdown: true
-    default_style: "light"
-    lightbox: true
-    css: "./www/style_Rmd.css"
 ---
 
 ```{r include = FALSE}
-
 if (!require("fontawesome")) {
   install.packages("fontawesome")
 }
-if (!require("klippy")) {
-  install.packages("remotes")
-  remotes::install_github("rlesur/klippy")
-}
 library(fontawesome)
 knitr::opts_chunk$set(echo = TRUE)
 knitr::opts_chunk$set(comment = NA)
-klippy::klippy(
-  position = c('top', 'right'),
-  color = "white",
-  tooltip_message = 'Click to copy',
-  tooltip_success = 'Copied !')
-
 ```
 
 [![cc_by_sa](./img/cc_by_sa.png)](http://creativecommons.org/licenses/by-sa/4.0/)
diff --git a/1_understanding_a_computer.Rmd b/1_understanding_a_computer.Rmd
index 2e03d5448962032714c9f941f875fd005a73f441..48793b691bc8ce37bbae563565e83950bb607b05 100644
--- a/1_understanding_a_computer.Rmd
+++ b/1_understanding_a_computer.Rmd
@@ -1,33 +1,15 @@
 ---
 title: Understanding a computer
 author: "Laurent Modolo"
-output:
-  rmdformats::downcute:
-    self_contain: true
-    use_bookdown: true
-    default_style: "light"
-    lightbox: true
-    css: "./www/style_Rmd.css"
 ---
 
 ```{r include = FALSE}
-
 if (!require("fontawesome")) {
   install.packages("fontawesome")
 }
-if (!require("klippy")) {
-  install.packages("remotes")
-  remotes::install_github("rlesur/klippy")
-}
 library(fontawesome)
 knitr::opts_chunk$set(echo = TRUE)
 knitr::opts_chunk$set(comment = NA)
-klippy::klippy(
-  position = c('top', 'right'),
-  color = "white",
-  tooltip_message = 'Click to copy',
-  tooltip_success = 'Copied !')
-
 ```
 
 <a rel="license" href="http://creativecommons.org/licenses/by-sa/4.0/">
diff --git a/2_using_the_ifb_cloud.Rmd b/2_using_the_ifb_cloud.Rmd
index 8a6c5a52c2d78de8a673f630e5b9c768868d4dbc..d4facc6eaf4d3317e2da9171536e6f48792a973f 100644
--- a/2_using_the_ifb_cloud.Rmd
+++ b/2_using_the_ifb_cloud.Rmd
@@ -1,33 +1,15 @@
 ---
 title: IFB (Institut Français de bio-informatique) Cloud
 author: "Laurent Modolo"
-output:
-  rmdformats::downcute:
-    self_contain: true
-    use_bookdown: true
-    default_style: "light"
-    lightbox: true
-    css: "./www/style_Rmd.css"
 ---
 
 ```{r include = FALSE}
-
 if (!require("fontawesome")) {
   install.packages("fontawesome")
 }
-if (!require("klippy")) {
-  install.packages("remotes")
-  remotes::install_github("rlesur/klippy")
-}
 library(fontawesome)
 knitr::opts_chunk$set(echo = TRUE)
 knitr::opts_chunk$set(comment = NA)
-klippy::klippy(
-  position = c('top', 'right'),
-  color = "white",
-  tooltip_message = 'Click to copy',
-  tooltip_success = 'Copied !')
-
 ```
 
 <a rel="license" href="http://creativecommons.org/licenses/by-sa/4.0/">
diff --git a/3_first_steps_in_a_terminal.Rmd b/3_first_steps_in_a_terminal.Rmd
index 607e08e6521ba55ceebb1508c731bf8127d7b04c..897738d5faedba8ef96b19e653aaec237e292f02 100644
--- a/3_first_steps_in_a_terminal.Rmd
+++ b/3_first_steps_in_a_terminal.Rmd
@@ -1,33 +1,15 @@
 ---
 title: First step in a terminal
 author: "Laurent Modolo"
-output:
-  rmdformats::downcute:
-    self_contain: true
-    use_bookdown: true
-    default_style: "light"
-    lightbox: true
-    css: "./www/style_Rmd.css"
 ---
 
 ```{r include = FALSE}
-
 if (!require("fontawesome")) {
   install.packages("fontawesome")
 }
-if (!require("klippy")) {
-  install.packages("remotes")
-  remotes::install_github("rlesur/klippy")
-}
 library(fontawesome)
 knitr::opts_chunk$set(echo = TRUE)
 knitr::opts_chunk$set(comment = NA)
-klippy::klippy(
-  position = c("top", "right"),
-  color = "white",
-  tooltip_message = "Click to copy",
-  tooltip_success = "Copied !"
-)
 ```
 
 <a rel="license" href="http://creativecommons.org/licenses/by-sa/4.0/">
diff --git a/4_unix_file_system.Rmd b/4_unix_file_system.Rmd
index 3470a9263a50420a6f437a837e880db36e04e958..20cfa85a21c5e38fd807a8aa4228581ebaeaf6ee 100644
--- a/4_unix_file_system.Rmd
+++ b/4_unix_file_system.Rmd
@@ -1,33 +1,15 @@
 ---
 title: GNU/Linux file system
 author: "Laurent Modolo"
-output:
-  rmdformats::downcute:
-    self_contain: true
-    use_bookdown: true
-    default_style: "light"
-    lightbox: true
-    css: "./www/style_Rmd.css"
 ---
 
 ```{r include = FALSE}
-
 if (!require("fontawesome")) {
   install.packages("fontawesome")
 }
-if (!require("klippy")) {
-  install.packages("remotes")
-  remotes::install_github("rlesur/klippy")
-}
 library(fontawesome)
 knitr::opts_chunk$set(echo = TRUE)
 knitr::opts_chunk$set(comment = NA)
-klippy::klippy(
-  position = c("top", "right"),
-  color = "white",
-  tooltip_message = "Click to copy",
-  tooltip_success = "Copied !"
-)
 ```
 
 <a rel="license" href="http://creativecommons.org/licenses/by-sa/4.0/">
diff --git a/5_users_and_rights.Rmd b/5_users_and_rights.Rmd
index e859b550329ae17aa1534e1e63e0d6756cb10f48..8f9413c50a7cf330c7432a7f790921774791804e 100644
--- a/5_users_and_rights.Rmd
+++ b/5_users_and_rights.Rmd
@@ -1,33 +1,15 @@
 ---
 title: Users and rights
 author: "Laurent Modolo"
-output:
-  rmdformats::downcute:
-    self_contain: true
-    use_bookdown: true
-    default_style: "light"
-    lightbox: true
-    css: "./www/style_Rmd.css"
 ---
 
 ```{r include = FALSE}
-
 if (!require("fontawesome")) {
   install.packages("fontawesome")
 }
-if (!require("klippy")) {
-  install.packages("remotes")
-  remotes::install_github("rlesur/klippy")
-}
 library(fontawesome)
 knitr::opts_chunk$set(echo = TRUE)
 knitr::opts_chunk$set(comment = NA)
-klippy::klippy(
-  position = c('top', 'right'),
-  color = "white",
-  tooltip_message = 'Click to copy',
-  tooltip_success = 'Copied !')
-
 ```
 
 [![cc_by_sa](./img/cc_by_sa.png)](http://creativecommons.org/licenses/by-sa/4.0/)
diff --git a/6_unix_processes.Rmd b/6_unix_processes.Rmd
index a2fa43f28acfcbeeb369f221219336090a88e5d1..1d5332330290eace481fa7611e25f4cdbbf26a1a 100644
--- a/6_unix_processes.Rmd
+++ b/6_unix_processes.Rmd
@@ -1,33 +1,15 @@
 ---
 title: Unix Processes
 author: "Laurent Modolo"
-output:
-  rmdformats::downcute:
-    self_contain: true
-    use_bookdown: true
-    default_style: "light"
-    lightbox: true
-    css: "./www/style_Rmd.css"
 ---
 
 ```{r include = FALSE}
-
 if (!require("fontawesome")) {
   install.packages("fontawesome")
 }
-if (!require("klippy")) {
-  install.packages("remotes")
-  remotes::install_github("rlesur/klippy")
-}
 library(fontawesome)
 knitr::opts_chunk$set(echo = TRUE)
 knitr::opts_chunk$set(comment = NA)
-klippy::klippy(
-  position = c("top", "right"),
-  color = "white",
-  tooltip_message = "Click to copy",
-  tooltip_success = "Copied !"
-)
 ```
 
 # Unix Processes
diff --git a/7_streams_and_pipes.Rmd b/7_streams_and_pipes.Rmd
index a0ccd7fa51b1c037f03af88da4c6ae7802d556eb..4c0dc46564ddbed0ef033d98bedd525443a8be68 100644
--- a/7_streams_and_pipes.Rmd
+++ b/7_streams_and_pipes.Rmd
@@ -1,33 +1,15 @@
 ---
 title: Unix Streams and pipes
 author: "Laurent Modolo"
-output:
-  rmdformats::downcute:
-    self_contain: true
-    use_bookdown: true
-    default_style: "light"
-    lightbox: true
-    css: "./www/style_Rmd.css"
 ---
 
 ```{r include = FALSE}
-
 if (!require("fontawesome")) {
   install.packages("fontawesome")
 }
-if (!require("klippy")) {
-  install.packages("remotes")
-  remotes::install_github("rlesur/klippy")
-}
 library(fontawesome)
 knitr::opts_chunk$set(echo = TRUE)
 knitr::opts_chunk$set(comment = NA)
-klippy::klippy(
-  position = c('top', 'right'),
-  color = "white",
-  tooltip_message = 'Click to copy',
-  tooltip_success = 'Copied !')
-
 ```
 
 [![cc_by_sa](./img/cc_by_sa.png)](http://creativecommons.org/licenses/by-sa/4.0/)
diff --git a/8_text_manipulation.Rmd b/8_text_manipulation.Rmd
index 09b76eec9a2f8b3f5d638f38254d798429eee9ce..9bfa4510cb60b626301a2a9d7a3b114319c94e08 100644
--- a/8_text_manipulation.Rmd
+++ b/8_text_manipulation.Rmd
@@ -1,33 +1,15 @@
 ---
 title: Text manipulation
 author: "Laurent Modolo"
-output:
-  rmdformats::downcute:
-    self_contain: true
-    use_bookdown: true
-    default_style: "light"
-    lightbox: true
-    css: "./www/style_Rmd.css"
 ---
 
 ```{r include = FALSE}
-
 if (!require("fontawesome")) {
   install.packages("fontawesome")
 }
-if (!require("klippy")) {
-  install.packages("remotes")
-  remotes::install_github("rlesur/klippy")
-}
 library(fontawesome)
 knitr::opts_chunk$set(echo = TRUE)
 knitr::opts_chunk$set(comment = NA)
-klippy::klippy(
-  position = c("top", "right"),
-  color = "white",
-  tooltip_message = "Click to copy",
-  tooltip_success = "Copied !"
-)
 ```
 
 [![cc_by_sa](./img/cc_by_sa.png)](http://creativecommons.org/licenses/by-sa/4.0/)
diff --git a/9_batch_processing.Rmd b/9_batch_processing.Rmd
index 8d817ce23a7b29906c69dda3269ef4517dccd92d..8318f35cfda32f4357b3604724d3ea33bbdd0056 100644
--- a/9_batch_processing.Rmd
+++ b/9_batch_processing.Rmd
@@ -1,33 +1,15 @@
 ---
 title: Batch processing
 author: "Laurent Modolo"
-output:
-  rmdformats::downcute:
-    self_contain: true
-    use_bookdown: true
-    default_style: "light"
-    lightbox: true
-    css: "./www/style_Rmd.css"
 ---
 
 ```{r include = FALSE}
-
 if (!require("fontawesome")) {
   install.packages("fontawesome")
 }
-if (!require("klippy")) {
-  install.packages("remotes")
-  remotes::install_github("rlesur/klippy")
-}
 library(fontawesome)
 knitr::opts_chunk$set(echo = TRUE)
 knitr::opts_chunk$set(comment = NA)
-klippy::klippy(
-  position = c('top', 'right'),
-  color = "white",
-  tooltip_message = 'Click to copy',
-  tooltip_success = 'Copied !')
-
 ```
 
 [![cc_by_sa](./img/cc_by_sa.png)](http://creativecommons.org/licenses/by-sa/4.0/)