diff --git a/HowtoMySQL.md b/HowtoMySQL.md
index 5eaec659..97374f8a 100644
--- a/HowtoMySQL.md
+++ b/HowtoMySQL.md
@@ -1521,29 +1521,31 @@ systemctl disable --now mariadb
 Créer un utilisateur dédié pour l'instance :
 
 ~~~
-# useradd mysqld1
+instance=1
+useradd mysqld${instance}
 ~~~
 
 Créer les dossiers qui vont accueillir le *datadir* et les données temporaire avec les bons droits :
 
 ~~~
-# mkdir -vp /srv/mysqld_instances/mysqld1 /home/mysqld1-tmp
-# touch /var/log/mysqld1.log
-# chmod 755 /srv /srv/mysqld_instances
-# chown -R mysqld1:mysqld1 /srv/mysqld_instances/mysqld1 /home/mysqld1-tmp /var/log/mysqld1.log
+mkdir -vp /srv/mysqld_instances/mysqld${instance} /home/mysqld${instance}-tmp
+touch /var/log/mysqld${instance}.log
+chmod 755 /srv /srv/mysqld_instances
+chown -R mysqld${instance}:mysqld${instance} /srv/mysqld_instances/mysqld${instance} /home/mysqld${instance}-tmp /var/log/mysqld${instance}.log
 ~~~
 
-Ajouter ces lignes dans `/etc/mysql/mariadb.conf.d/zzz_mysqld1.cnf` :
+Ajouter ces lignes dans `/etc/mysql/mariadb.conf.d/zzz_mysqld${instance}.cnf` :
 
 ~~~{.ini}
-[mysqld1]
-user = mysqld1
-port = 3307
-tmpdir = /home/mysqld1-tmp/
-socket = /var/run/mysqld1/mysqld1.sock
-pid-file = /var/run/mysqld1/mysqld1.pid
-datadir = /srv/mysqld_instances/mysqld1
-log_error = /var/log/mysqld1.log
+echo "[mysqld${instance}]
+user = mysqld${instance}
+port = $((3306+${instance}))
+tmpdir = /home/mysqld${instance}-tmp/
+socket = /var/run/mysqld${instance}/mysqld${instance}.sock
+pid-file = /var/run/mysqld${instance}/mysqld${instance}.pid
+datadir = /srv/mysqld_instances/mysqld${instance}
+log_error = /var/log/mysqld${instance}.log" \
+> /etc/mysql/mariadb.conf.d/zzz_mysqld${instance}.cnf
 ~~~
 
 L'ajout de ces directives permet de désactiver l'héritage des valeurs issue de l'instance principale :
@@ -1557,14 +1559,14 @@ slow_query_log = 0
 Ajuster les permissions du fichier de configuration :
 
 ~~~
-# chmod 644 /etc/mysql/mariadb.conf.d/zzz_mysqld1.cnf
+chmod 644 /etc/mysql/mariadb.conf.d/zzz_mysqld${instance}.cnf
 ~~~
 
 Créer manuellement le *datadir* :
 
 ~~~
-# mysql_install_db --user=mysqld1 --datadir=/srv/mysqld_instances/mysqld1 --defaults-file=/etc/mysql/mariadb.conf.d/zzz_mysqld1.cnf
-# chmod 700 /srv/mysqld_instances/mysqld1
+mysql_install_db --user=mysqld${instance} --datadir=/srv/mysqld_instances/mysqld${instance} --defaults-file=/etc/mysql/mariadb.conf.d/zzz_mysqld${instance}.cnf
+chmod 700 /srv/mysqld_instances/mysqld${instance}
 ~~~
 
 ### Démarrer une instance avec systemd