diff --git a/doc/dev.md b/doc/dev.md
index 330eb63..f8207bd 100644
--- a/doc/dev.md
+++ b/doc/dev.md
@@ -1,7 +1,7 @@
 # init.sh developper's reference
 
 ## Getting started
-This is a programmer reference. It's not intended to be a manual, be a reference
+This is a programmer reference. It's not intended to be a manual, but a reference
 for all internal functions, so you can easily build your own modules. This
 suppose you already read the [Readme file](../README.md). Creating modules
 will also requires some good knowledge of Bash programming.
@@ -9,4 +9,70 @@ will also requires some good knowledge of Bash programming.
 ## The aaa_error.sh file
 ### Functions
 #### check_root
+Check if user is root. If user is not root, script execution is interupted and
+exit with error.
+
+This function have no parameter.
+
+If the variable NO_ROOT_CHECK is set to true the function always exit without
+error and no check is done.
+
+#### die
+Trigger an error, print a backtrace and exit the script, unless KEEPGOING
+variable is set to true. In that situation we just display a warning.
+
+If the parameter --force is given, we exit even if the KEEPGOING variable is set
+to true.
+
+#### noerror
+Allow te execution of a command bypassing the error management system. The purpose
+is to allow execution of test returning normally a non zero value without
+triggering an error and the following exit.
+
+If the first parameter is --noout all the outputs are disabled. The other
+parameters are the raw command line to execute.
+
+The function echoes the error code returned by the executed command.
+
+### Other functionnalities
+The simple integration of aaa_error.sh file into a script, will change the script
+behaviour. The following Bash signals will be trapped:
+ - **ERR**: The ERR signal is triggered every time Bash encounter an error or if
+a command return a non zero value. The function called on that signal will stop
+execution of the script displaying an error message with error code and a backtrace
+to help identify the error origin.
+ - **SIGINT**: That signal is trigerred when Ctrl + C is pressed by the user. That
+signal will be interpreted only if the command is a Bash internal. If an executable
+receive the signal it will be interpreted with the own executable mechanisms. We
+will exit after cleanup.
+ - **SIGTERM**: That signal is typically the result of an external kill of the bash
+process running the script. We will exit after cleanup.
+
+## The display.sh file
+### Functions
+#### prnt
+Print a message with timestamp and header. The header depends on first parameter
+will be collored and have a fixed lenght so text is always alligned.
+
+The first parameter is the header type, having those possible values:
+ - **I**: Display an informative message in green
+ - **W**: Display a warning in yellow
+ - **E**: Display an error in red
+ - **m**: Display a message without header but alligned
+ - Anything else will be treated as the message and will loose alignment.
+ 
+Second parameter is the message to display.
+ 
+### Other functionnalities
+Using that script will declare many easy to remember variables containing Bash
+color codes :
+
+ - Standard codes depending on your environment: DEFAULTFG, DEFAULTBG, DEFAULTCOL=${DEFAULTBG}${DEFAULTFG}
+ - Regular Colors: Black, Red, Green, Yellow, Blue, Purple, Cyan, White
+ - Bold: BBlack, BRed, BGreen, BYellow, BBlue, BPurple, BCyan, BWhite
+ - Underline: UBlack, URed, UGreen, UYellow, UBlue, UPurple, UCyan, UWhite
+ - Background: On_Black, On_Red, On_Green, On_Yellow, On_Blue, On_Purple, On_Cyan, On_White
+ - High Intensity:  IBlack, IRed, IGreen, IYellow, IBlue, IPurple, ICyan, IWhite
+ - Bold High Intensity:  BIBlack, BIRed, BIGreen, BIYellow, BIBlue, BIPurple, BICyan, BIWhite
+ - High Intensity backgrounds: On_IBlack, On_IRed, On_IGreen, On_IYellow, On_IBlue, On_IPurple, On_ICyan, On_IWhite
 
diff --git a/init.sh b/init.sh
index 6e30135..d2c52e9 100755
--- a/init.sh
+++ b/init.sh
@@ -108,7 +108,7 @@ load_configuration
 process_commandline_and_vars
 
 # Declare proxy system vars if needed and if not already declared
-if [[ -n $PROXYSRV && -n $PROXYSRVPORT ]]; then
+if [[ -n $PROXYSRV && -n $PROXYSRVPORT && -z $NO_PROXY ]]; then
     export http_proxy=${http_proxy:-"http://$PROXYSRV:$PROXYSRVPORT/"}
     export https_proxy=${https_proxy:-"http://$PROXYSRV:$PROXYSRVPORT/"}
 fi
diff --git a/lib/display.sh b/lib/display.sh
index e3f5007..96f74f3 100644
--- a/lib/display.sh
+++ b/lib/display.sh
@@ -93,8 +93,8 @@ export On_IWhite='\e[0;107m'
 prnt() {
     case $1 in
         "I")
-            HEADS="[   ${IGreen}info${DEFAULTFG}  ]"
-            shift 
+            HEADS="[  ${IGreen}info${DEFAULTFG}   ]"
+            shift ##
             ;;
         "W")
             HEADS="[${IYellow}Attention${DEFAULTFG}]"
diff --git a/lib/support.sh b/lib/support.sh
index e3969ec..8123597 100644
--- a/lib/support.sh
+++ b/lib/support.sh
@@ -33,6 +33,8 @@ Options :
 	-k, --keep-going	Continue l'execution en cas d'erreur.
 	-r, --resume		Reprend l'execution là ou elle s'est arrêté.
 	-R, --no-root-check     Ne pas vérifier les droits root (ou UID 0)
+	-P, --no-proxy		Ne pas utiliser de proxy lors de l'utilisation de
+	    			ce script (n'empêche pas leur configuration via modules)
 	-h, --help		Affiche ce texte d'aide.
 	-l, --logfile <nom>     Nom du fichier de log. Peut aussi être changé
                                 via la variable d'environnement LOGFILE.
diff --git a/lib/zzz_main_fct.sh b/lib/zzz_main_fct.sh
index 4c613dc..fb9cc3c 100644
--- a/lib/zzz_main_fct.sh
+++ b/lib/zzz_main_fct.sh
@@ -59,6 +59,9 @@ read_commandline()
             "-R"|"--no-root-check")
                 export NO_ROOT_CHECK=true
                 ;;
+            "-P"|"--no-proxy")
+                export NO_PROXY=true
+                ;;
             "-l"|"--logfile")
                 local want_logfile=true
                 ;;