diff --git a/creationRoutesVM.sh b/creationRoutesVM.sh
index c029dec..c217a73 100755
--- a/creationRoutesVM.sh
+++ b/creationRoutesVM.sh
@@ -17,7 +17,17 @@ else
 	printf 'Can’t source "creds": file not found\n'
 fi
 
-exit 0
+# check for commands in the path
+for bin in curl ipv6calc ip; do
+	if [ -z $(which ${bin} 2>/dev/null) ]; then
+		MISSING="${MISSING} ${bin}"
+	fi
+done
+
+if [ ! -z "${MISSING}" ]; then
+	printf "You’r missing this:${MISSING}\n"
+	exit 1
+fi
 
 # ID subnets IPAM V4 et V6 contenants les VMs
 ID_RANGES_V4=( "74" "181" )