diff --git a/ap23/script/dau.sh b/ap23/script/dau.sh
index 63d1197..0276849 100755
--- a/ap23/script/dau.sh
+++ b/ap23/script/dau.sh
@@ -1,11 +1,13 @@
 #!/bin/bash
 
+set -e
+set -u
 #check si il y a un argument et exit 1 si y'a pas
-if [ ! $1 ] ; then
+if [ ! "$1" ] ; then
 	echo "Usage : $0 user >> /var/www/html/dokuwiki/conf/users.auth.php"
 	exit 1
 fi
 
 # chiffremment du mot de passe $1 avec bcrypt
-hashpass=$(htpasswd -bnBC 10 "" $1|tr -d '/d')
+hashpass=$(htpasswd -bnBC 10 "" "${1}"|tr -d '\d')
 echo "${1}${hashpass}:${1}:${1}@localhost:${1},user"