diff --git a/config_files/.zshrc b/config_files/.zshrc
index ccaf1f3..47e6e95 100644
--- a/config_files/.zshrc
+++ b/config_files/.zshrc
@@ -2,7 +2,7 @@
 
 
 #PS1="%(?:%{%}➜ :%{%}➜ ) %{$fg[cyan]%}%c%{$reset_color%} $(git_prompt_info)"
-PS1='%(?:%{%}➜ :%{%}➜ ) %{$fg[cyan]%}%test%{$reset_color%} $(git_prompt_info)'
+#PS1='%(?:%{%}➜ :%{%}➜ ) %{$fg[cyan]%}%test%{$reset_color%} $(git_prompt_info)'
 
 
 
diff --git a/install.sh b/install.sh
index 5312b3e..e5a9957 100644
--- a/install.sh
+++ b/install.sh
@@ -7,25 +7,12 @@ source ./asides/color.sh
 KEY_PHRASE="#hugogogo#"
 HERE=$(pwd)
 D_CONFIG_FILES="config_files"
+ASK_INSTALL="y"
 
 # create those folders if necessary :
 mkdir -p ~/.vim/templates
 mkdir -p ~/.vim/swapfiles
 
-# tells git to use vim as default editor
-echo -e $MAGENTA"declared vim as default editor for git"$ENDCO
-git config --global core.editor "vim"
-
-# install those package :
-# vim
-# wget
-# vlc
-# signal-desktop
-# element-desktop
-# nextcloud-desktop
-# transmission
-# htop
-# build-essential (gcc g++ make etc...)
 
 # receive 1 argument : absolute path to config file
 function save_bak
@@ -48,7 +35,7 @@ function save_bak
 	mv $file_to $file_to.hubak$number
 }
 
-# receive 1 argument : absolute path to config file
+# receives 1 argument : "absolute path to config file"
 function install
 {
 	local file_to="$1"
@@ -85,14 +72,108 @@ function install
 	fi
 }
 
-# argument : directory where the config file should go
-install "$HOME/.screenrc"
-install "$HOME/.vimrc"
-install "$HOME/.zshrc"
-install "$HOME/.vim/templates/skeleton_colors.h"
-install "$HOME/.vim/templates/skeleton_tests.hpp"
-install "$HOME/.vim/templates/skeleton.cpp"
-install "$HOME/.vim/templates/skeleton.hpp"
-install "$HOME/.vim/templates/skeleton_main.cpp"
-install "$HOME/.vim/templates/skeleton_makefile"
+# receives 1 argument : a chain of acceptables uniques characters (ex: yn)
+function user_choice
+{
+	while true; do
+		read -n 1 -s choice
+		if [[ $choice == [$1] ]]; then
+			# the function need to run in a command substitution, and this line gives the result
+			echo $choice
+			return
+		fi
+	done
+}
+
+
+# Ask what to install
+echo "
+	(a) Do you want to config all programs: git, screen, zsh, and vim ?
+	(c) Or do you want to choose for each of them ?
+
+	validate by typing the character in parenthesis (-) :
+	"
+ASK_INSTALL=$(user_choice "ac")
+
+CONFIG_GIT=n
+CONFIG_SCREEN=n
+CONFIG_ZSH=n
+CONFIG_VIM=n
+if [ "$ASK_INSTALL" = "a" ]; then
+	CONFIG_GIT=y
+	CONFIG_SCREEN=y
+	CONFIG_ZSH=y
+	CONFIG_VIM=y
+fi
+
+
+
+# config each program :
+
+if [ "$ASK_INSTALL" = "c" ]; then
+	echo "
+	do you want to config git ?
+	(y) Yes
+	(n) No
+	"
+	CONFIG_GIT=$(user_choice "yn")
+fi
+if [ "$CONFIG_GIT" = "y" ]; then
+	echo "config git"
+	echo -e $MAGENTA"make vim default editor for git"$ENDCO
+	git config --global core.editor "vim"
+else
+	echo "skip git"
+fi
+
+if [ "$ASK_INSTALL" = "c" ]; then
+	echo "
+	do you want to config screen ?
+	(y) Yes
+	(n) No
+	"
+	CONFIG_SCREEN=$(user_choice "yn")
+fi
+if [ "$CONFIG_SCREEN" = "y" ]; then
+	echo "config screen"
+	install "$HOME/.screenrc"
+else
+	echo "skip screen"
+fi
+
+if [ "$ASK_INSTALL" = "c" ]; then
+	echo "
+	do you want to config zsh ?
+	(y) Yes
+	(n) No
+	"
+	CONFIG_ZSH=$(user_choice "yn")
+fi
+if [ "$CONFIG_ZSH" = "y" ]; then
+	echo "config zsh"
+	install "$HOME/.zshrc"
+else
+	echo "skip zsh"
+fi
+
+if [ "$ASK_INSTALL" = "c" ]; then
+	echo "
+	do you want to config vim ?
+	(y) Yes
+	(n) No
+	"
+	CONFIG_VIM=$(user_choice "yn")
+fi
+if [ "$CONFIG_VIM" = "y" ]; then
+	echo "config vim"
+	install "$HOME/.vimrc"
+	install "$HOME/.vim/templates/skeleton_colors.h"
+	install "$HOME/.vim/templates/skeleton_tests.hpp"
+	install "$HOME/.vim/templates/skeleton.cpp"
+	install "$HOME/.vim/templates/skeleton.hpp"
+	install "$HOME/.vim/templates/skeleton_main.cpp"
+	install "$HOME/.vim/templates/skeleton_makefile"
+else
+	echo "skip vim"
+fi
 
diff --git a/tutos/computer.txt b/tutos/computer.txt
index 77397c9..8e05601 100644
--- a/tutos/computer.txt
+++ b/tutos/computer.txt
@@ -269,3 +269,16 @@ find | sort | grep -ve "node_modules/" -e ".git/" | sed 's#[^/]*/#|__ #g;s#__ |#
 **todo !**
 	- re-add code to move cursor on wrap text in vimrc
 	- add vimrc, zshrc, and screenrc in default screen windows
+
+**ecowan server :**
+	- changed user "root" and "ecowan" password
+	  - sudo passwd username
+	- created "huho" user (with same passwd)
+	- added it to the sudo group so it can use sudo (`sudo usermod -aG sudo huho`)
+	- did not add it to the sudoers file (`visudo` then add line `huho ALL=(ALL) ALL`)
+	- disabling user "ecowan" shell access with `sudo usermod --shell /sbin/nologin ecowan`
+	  - https://unix.stackexchange.com/questions/10852/whats-the-difference-between-sbin-nologin-and-bin-false#10867
+		- its possible to re-enable it with `sudo usermod --shell /bin/bash ecowan` 
+	- added ssh pub key by running this command in local :
+	  - ssh-copy-id username@server_ip
+