diff --git a/ethernet_restreint/clean_no_restrent.sh b/ethernet_restreint/clean_no_restrent.sh
index 2e4401c..1e404ef 100755
--- a/ethernet_restreint/clean_no_restrent.sh
+++ b/ethernet_restreint/clean_no_restrent.sh
@@ -1,16 +1,33 @@
 #!/bin/sh
 
+
+if which doas 2> /dev/null
+then
+    rooter=$(which doas)
+elif which sudo 2> /dev/null
+then
+    rooter=$(which sudo)
+    sudo echo "Exec of the script" || exit 1
+elif [ "$(id -u)" == "0" ]
+then
+    rooter=""
+else
+    echo "Error, no enough rights" >&2
+    exit
+fi
+
+
 echo "clean firewall"
-echo "0" | tee /proc/sys/net/ipv4/ip_forward
-sv stop nftables
-sv start nftables
+echo "0" | $rooter tee /proc/sys/net/ipv4/ip_forward
+$rooter sv stop nftables
+$rooter sv start nftables
 
 echo "clean veth0 and br0"
-ip link del veth0
-ip link del br0
-ip link del dummy0
+$rooter ip link del veth0
+$rooter ip link del br0
+$rooter ip link del dummy0
 
 echo "clean the rest of the bridges."
-ip link del br1
-ip link del br2
+$rooter ip link del br1
+$rooter ip link del br2
 
diff --git a/ethernet_restreint/no_restreint.sh b/ethernet_restreint/no_restreint.sh
index bfac48c..9e358fd 100755
--- a/ethernet_restreint/no_restreint.sh
+++ b/ethernet_restreint/no_restreint.sh
@@ -1,12 +1,13 @@
 #!/bin/sh
 
 
-if which doas &> /dev/null
+if which doas 2> /dev/null
 then
     rooter=$(which doas)
-elif which sudo &> /dev/null
+elif which sudo 2> /dev/null
 then
     rooter=$(which sudo)
+    sudo echo "Exec of the script" || exit 1
 elif [ "$(id -u)" == "0" ]
 then
     rooter=""
@@ -23,7 +24,7 @@ echo "e"
 $rooter nft "table inet my_nat {
 	chain postrouting {
 		type nat hook postrouting priority srcnat; policy accept;
-		oifname "wlan0" masquerade
+		oifname \"wlan0\" masquerade
 	}
 }"
 
diff --git a/vm-start.sh b/vm-start.sh
index d9384ae..6551922 100755
--- a/vm-start.sh
+++ b/vm-start.sh
@@ -49,12 +49,14 @@ then
     echo "$MAIN_LOCATION created to contain all virtual machines."
 fi
 
-OPTION="-display gtk \
+OPTION="-display gtk,gl=on,show-cursor=on,show-menubar=off \
+    -device virtio-gpu-gl \
     -usbdevice tablet \
     -daemonize"
 
         # other options choices
         #
+    #-display gtk,show-menubar=off,gl=on,show-cursor=on,zoom-to-fit=on \
         #-display sdl
         #-vga qxl
         #-usbdevice tablet \