diff --git a/package_check.sh b/package_check.sh
index ef7faa4..5afc28e 100755
--- a/package_check.sh
+++ b/package_check.sh
@@ -295,26 +295,33 @@ then
 	main_iface=$(grep iface= "$pcheck_config" | cut -d '=' -f2)
 fi
 
+# Use the default value and set it in the config file
+replace_default_value () {
+	CONFIG_KEY=$1
+	local value=$(grep "|| $CONFIG_KEY=" "$build_script" | cut -d '=' -f2)
+	if grep -q $CONFIG_KEY= "$pcheck_config"
+	then
+		sed -i "s/$CONFIG_KEY=.*/$CONFIG_KEY=$value/"
+	else
+		echo -e "$CONFIG_KEY=$value\n" >> "$pcheck_config"
+	fi
+	echo $value
+}
 # Use default value from the build script if needed
 if [ -z "$ip_range" ]; then
-	ip_range=$(grep "|| PLAGE_IP=" "$build_script" | cut -d '"' -f4)
-	echo -e "# Ip range for the container\nPLAGE_IP=$ip_range\n" >> "$pcheck_config"
+	ip_range=$(replace_default_value PLAGE_IP)
 fi
 if [ -z "$main_domain" ]; then
-	main_domain=$(grep "|| DOMAIN="  "$build_script" | cut -d '=' -f2)
-	echo -e "# Test domain\nDOMAIN=$main_domain\n" >> "$pcheck_config"
+	main_domain=$(replace_default_value DOMAIN)
 fi
 if [ -z "$yuno_pwd" ]; then
-	yuno_pwd=$(grep "|| YUNO_PWD="  "$build_script" | cut -d '=' -f2)
-	echo -e "# YunoHost password, in the container\nYUNO_PWD=$yuno_pwd\n" >> "$pcheck_config"
+	yuno_pwd=$(replace_default_value YUNO_PWD)
 fi
 if [ -z "$lxc_name" ]; then
-	lxc_name=$(grep "|| LXC_NAME="  "$build_script" | cut -d '=' -f2)
-	echo -e "# Container name\nLXC_NAME=$lxc_name\n" >> "$pcheck_config"
+	lxc_name=$(replace_default_value LXC_NAME)
 fi
 if [ -z "$lxc_bridge" ]; then
-	lxc_bridge=$(grep "|| LXC_BRIDGE="  "$build_script" | cut -d '=' -f2)
-	echo -e "# Bridge name\nLXC_BRIDGE=$lxc_bridge\n" >> "$pcheck_config"
+	lxc_bridge=$(replace_default_value LXC_BRIDGE)
 fi
 
 if [ -z "$main_iface" ]; then
@@ -330,7 +337,12 @@ if [ -z "$main_iface" ]; then
 		exit 1
 	fi
 	# Store the main iface in the config file
-	echo -e "# Main host iface\niface=$main_iface\n" >> "$pcheck_config"
+	if grep -q iface= "$pcheck_config"
+	then
+		sed -i "s/iface=.*/iface=$main_iface/"
+	else
+		echo -e "# Main host iface\niface=$main_iface\n" >> "$pcheck_config"
+	fi
 fi
 
 #=================================================
diff --git a/sub_scripts/lxc_build.sh b/sub_scripts/lxc_build.sh
index f78a02f..def0def 100755
--- a/sub_scripts/lxc_build.sh
+++ b/sub_scripts/lxc_build.sh
@@ -19,7 +19,7 @@ then
 fi
 
 LOG_BUILD_LXC="$script_dir/Build_lxc.log"
-test -n "$PLAGE_IP" || PLAGE_IP="10.1.4"	# Utilise des valeurs par défaut si les variables sont vides.
+test -n "$PLAGE_IP" || PLAGE_IP=10.1.4	# Utilise des valeurs par défaut si les variables sont vides.
 test -n "$DOMAIN" || DOMAIN=domain.tld
 test -n "$YUNO_PWD" || YUNO_PWD=admin
 test -n "$LXC_NAME" || LXC_NAME=pchecker_lxc
diff --git a/sub_scripts/lxc_check.sh b/sub_scripts/lxc_check.sh
index 91768fd..723f8e6 100755
--- a/sub_scripts/lxc_check.sh
+++ b/sub_scripts/lxc_check.sh
@@ -19,26 +19,35 @@ then
 	LXC_BRIDGE=$(cat "$pcheck_config" | grep LXC_BRIDGE= | cut -d '=' -f2)
 	main_iface=$(cat "$pcheck_config" | grep iface= | cut -d '=' -f2)
 fi
+
+# Use the default value and set it in the config file
+replace_default_value () {
+	CONFIG_KEY=$1
+	local value=$(grep "|| $CONFIG_KEY=" "$build_script" | cut -d '=' -f2)
+	if grep -q $CONFIG_KEY= "$pcheck_config"
+	then
+		sed -i "s/$CONFIG_KEY=.*/$CONFIG_KEY=$value/"
+	else
+		echo -e "$CONFIG_KEY=$value\n" >> "$pcheck_config"
+	fi
+	echo $value
+}
+
 # Utilise des valeurs par défaut si les variables sont vides, et génère le fichier de config
 if [ -z "$PLAGE_IP" ]; then
-	PLAGE_IP=$(cat "$script_dir/sub_scripts/lxc_build.sh" | grep "|| PLAGE_IP=" | cut -d '"' -f4)
-	echo -e "# Plage IP du conteneur\nPLAGE_IP=$PLAGE_IP\n" >> "$pcheck_config"
+	PLAGE_IP=$(replace_default_value PLAGE_IP)
 fi
 if [ -z "$DOMAIN" ]; then
-	DOMAIN=$(cat "$script_dir/sub_scripts/lxc_build.sh" | grep "|| DOMAIN=" | cut -d '=' -f2)
-	echo -e "# Domaine de test\nDOMAIN=$DOMAIN\n" >> "$pcheck_config"
+	DOMAIN=$(replace_default_value DOMAIN)
 fi
 if [ -z "$YUNO_PWD" ]; then
-	YUNO_PWD=$(cat "$script_dir/sub_scripts/lxc_build.sh" | grep "|| YUNO_PWD=" | cut -d '=' -f2)
-	echo -e "# Mot de passe\nYUNO_PWD=$YUNO_PWD\n" >> "$pcheck_config"
+	YUNO_PWD=$(replace_default_value YUNO_PWD)
 fi
 if [ -z "$LXC_NAME" ]; then
-	LXC_NAME=$(cat "$script_dir/sub_scripts/lxc_build.sh" | grep "|| LXC_NAME=" | cut -d '=' -f2)
-	echo -e "# Nom du conteneur\nLXC_NAME=$LXC_NAME\n" >> "$pcheck_config"
+	LXC_NAME=$(replace_default_value LXC_NAME)
 fi
 if [ -z "$LXC_BRIDGE" ]; then
-	LXC_BRIDGE=$(cat "$script_dir/sub_scripts/lxc_build.sh" | grep "|| LXC_BRIDGE=" | cut -d '=' -f2)
-	echo -e "# Nom du bridge\nLXC_BRIDGE=$LXC_BRIDGE\n" >> "$pcheck_config"
+	LXC_BRIDGE=$(replace_default_value LXC_BRIDGE)
 fi
 if [ -z "$main_iface" ]; then
 	# Tente de définir l'interface réseau principale
@@ -47,8 +56,13 @@ if [ -z "$main_iface" ]; then
 		echo -e "\e[91mImpossible de déterminer le nom de l'interface réseau de l'hôte.\e[0m"
 		exit 1
 	fi
-	# Enregistre le nom de l'interface réseau de l'hôte dans un fichier de config
-	echo -e "# Interface réseau principale de l'hôte\niface=$main_iface\n" >> "$pcheck_config"
+	# Store the main iface in the config file
+	if grep -q iface= "$pcheck_config"
+	then
+		sed -i "s/iface=.*/iface=$main_iface/"
+	else
+		echo -e "# Main host iface\niface=$main_iface\n" >> "$pcheck_config"
+	fi
 fi
 
 STOP_CONTAINER () {