diff --git a/ecoleA/update.sh b/ecoleA/update.sh
index 0849d67..548aae3 100644
--- a/ecoleA/update.sh
+++ b/ecoleA/update.sh
@@ -1,4 +1,11 @@
 #!/bin/bash
+
+# Test du user ROOT
+if [ "$EUID" -ne 0 ]
+  then echo "Please run as root"
+  exit
+fi
+
 # Suppression des kernels non utilisé
 echo -e "\n [INFO] Kernel installé mais plus utilisé"
 dpkg --list 'linux-image*' | grep ^ii | awk '{print $2}' | sort | egrep "[0-9]-generic" | head -n 3 | tr '\n' ' ' > list-kernel