diff --git a/check_process b/check_process
index 53881e3..7c8ac68 100644
--- a/check_process
+++ b/check_process
@@ -3,21 +3,20 @@
 # Commentaire ignoré
     ; Manifest
         domain="$DOMAIN"    (DOMAIN)
-        path="$PATH"    (PATH)
         is_public=1 (PUBLIC|public=1|private=0)
     ; Checks
         pkg_linter=1
         setup_sub_dir=1
-        setup_root=1
-        setup_nourl=0
+        setup_root=0
+        setup_nourl=1
         setup_private=1
         setup_public=1
         upgrade=1
         backup_restore=1
         multi_instance=0
-        wrong_user=1
+        wrong_user=0
         wrong_path=1
-        incorrect_path=1
+        incorrect_path=0
         corrupt_source=1
         fail_download_source=1
         port_already_use=1 (8008)
diff --git a/scripts/_common.sh b/scripts/_common.sh
index 46f7cda..8c45ee6 100755
--- a/scripts/_common.sh
+++ b/scripts/_common.sh
@@ -50,13 +50,53 @@ GET_DEBIAN_VERSION() {
 }
 
 enable_backport_repos() {
-    if [[ -z "$(grep -e "^deb .*/.* $debian_version-backports main" /etc/apt/sources.list ; grep -e "^deb .*/.* $debian_version-backports main" /etc/apt/sources.list.d/*)" ]]
+    if [[ -z "$(grep -e "^deb .*/.* $debian_version-backports main" /etc/apt/sources.list ; grep -e "^deb .*/.* $debian_version-backports main" /etc/apt/sources.list.d/*.list)" ]]
     then
         echo "deb $(grep -m 1 "^deb .* $debian_version .*main" /etc/apt/sources.list | cut -d ' ' -f2) $debian_version-backports main contrib non-free" | sudo tee -a "/etc/apt/sources.list"
     fi
     ynh_package_update
 }
 
+set_access() { # example : set_access USER FILE
+user="$1"
+file_to_set="$2"
+while [[ 0 ]]
+do    
+    path_to_set=""
+    oldIFS="$IFS"
+    IFS="/"
+    for dirname in $file_to_set
+    do
+        if [[ -n "$dirname" ]]
+        then
+            sudo test -f "$path_to_set"/"$dirname" && sudo setfacl -m d:u:$user:r "$path_to_set"
+            
+            path_to_set="$path_to_set/$dirname"
+            
+            if $(sudo sudo -u $user test ! -r "$path_to_set")
+            then
+                sudo test -d "$path_to_set" && sudo setfacl -m user:$user:rx  "$path_to_set"
+                sudo test -f "$path_to_set" && sudo setfacl -m user:$user:r  "$path_to_set"
+                sudo test -L "$path_to_set" && sudo setfacl -m user:$user:r  "$path_to_set"
+            fi
+        fi
+    done
+    IFS="$oldIFS"
+    
+    if $(sudo test -L "$file_to_set")
+    then
+        if [[ -n "$(sudo readlink "$file_to_set" | grep -e "^/")" ]]
+        then
+            file_to_set=$(sudo readlink "$file_to_set") # If it is an absolute path
+        else
+            file_to_set=$(sudo realpath -s -m "$(echo "$file_to_set" | cut -d'/' -f-$(echo "$file_to_set" | grep -o '/' | wc -l))/$(sudo readlink "$file_to_set")") # If it is an relative path (we get with realpath the absolute path)
+        fi
+    else
+        break
+    fi
+done
+}
+
 CHECK_VAR () {	# Vérifie que la variable n'est pas vide.
 # $1 = Variable à vérifier
 # $2 = Texte à afficher en cas d'erreur
diff --git a/scripts/install b/scripts/install
index 89c401d..7f674cd 100644
--- a/scripts/install
+++ b/scripts/install
@@ -99,13 +99,13 @@ sudo sed -i "s@__DOMAIN__@$domain@g" /etc/turnserver.conf
 sudo sed -i "s@__TLS_PORT__@$turnserver_tls_port@g" /etc/turnserver.conf
 
 # Configure access for certificates
-sudo setfacl -m user:matrix-synapse:r /etc/yunohost/certs/$domain/crt.pem
-sudo setfacl -m user:matrix-synapse:r /etc/yunohost/certs/$domain/key.pem
-sudo setfacl -m user:matrix-synapse:r /etc/yunohost/certs/$domain/dh.pem
+set_access matrix-synapse /etc/yunohost/certs/$domain/crt.pem
+set_access matrix-synapse /etc/yunohost/certs/$domain/key.pem
+set_access matrix-synapse /etc/yunohost/certs/$domain/dh.pem
 
-sudo setfacl -m user:turnserver:r /etc/yunohost/certs/$domain/crt.pem
-sudo setfacl -m user:turnserver:r /etc/yunohost/certs/$domain/key.pem
-sudo setfacl -m user:turnserver:r /etc/yunohost/certs/$domain/dh.pem
+set_access turnserver /etc/yunohost/certs/$domain/crt.pem
+set_access turnserver /etc/yunohost/certs/$domain/key.pem
+set_access turnserver /etc/yunohost/certs/$domain/dh.pem
 
 # Configuration de logrotate
 sed -i "s@__APP__@$app@g" ../conf/logrotate
diff --git a/scripts/restore b/scripts/restore
index 21cf499..128f7ab 100644
--- a/scripts/restore
+++ b/scripts/restore
@@ -66,6 +66,45 @@ enable_backport_repos() {
     ynh_package_update
 }
 
+set_access() { # example : set_access USER FILE
+user="$1"
+file_to_set="$2"
+while [[ 0 ]]
+do    
+    path_to_set=""
+    oldIFS="$IFS"
+    IFS="/"
+    for dirname in $file_to_set
+    do
+        if [[ -n "$dirname" ]]
+        then
+            sudo test -f "$path_to_set"/"$dirname" && sudo setfacl -m d:u:$user:r "$path_to_set"
+            
+            path_to_set="$path_to_set/$dirname"
+            
+            if $(sudo sudo -u $user test ! -r "$path_to_set")
+            then
+                sudo test -d "$path_to_set" && sudo setfacl -m user:$user:rx  "$path_to_set"
+                sudo test -f "$path_to_set" && sudo setfacl -m user:$user:r  "$path_to_set"
+            fi
+        fi
+    done
+    IFS="$oldIFS"
+    
+    if $(sudo test -L "$file_to_set")
+    then
+        if [[ -n "$(sudo readlink "$file_to_set" | grep -e "^/")" ]]
+        then
+            file_to_set=$(sudo readlink "$file_to_set") # If it is an absolute path
+        else
+            file_to_set=$(sudo realpath -s -m "$(echo "$file_to_set" | cut -d'/' -f-$(echo "$file_to_set" | grep -o '/' | wc -l))/$(sudo readlink "$file_to_set")") # If it is an relative path (we get with realpath the absolute path)
+        fi
+    else
+        break
+    fi
+done
+}
+
 CHECK_VAR () {	# Vérifie que la variable n'est pas vide.
 # $1 = Variable à vérifier
 # $2 = Texte à afficher en cas d'erreur
@@ -201,13 +240,13 @@ sudo cp -a ./coturn_config_default "/etc/default/coturn"
 sudo cp -a ./data/. "/var/lib/matrix-synapse/."
 
 # Configure access for certificates
-sudo setfacl -m user:matrix-synapse:r /etc/yunohost/certs/$domain/crt.pem
-sudo setfacl -m user:matrix-synapse:r /etc/yunohost/certs/$domain/key.pem
-sudo setfacl -m user:matrix-synapse:r /etc/yunohost/certs/$domain/dh.pem
+set_access matrix-synapse /etc/yunohost/certs/$domain/crt.pem
+set_access matrix-synapse /etc/yunohost/certs/$domain/key.pem
+set_access matrix-synapse /etc/yunohost/certs/$domain/dh.pem
 
-sudo setfacl -m user:turnserver:r /etc/yunohost/certs/$domain/crt.pem
-sudo setfacl -m user:turnserver:r /etc/yunohost/certs/$domain/key.pem
-sudo setfacl -m user:turnserver:r /etc/yunohost/certs/$domain/dh.pem
+set_access turnserver /etc/yunohost/certs/$domain/crt.pem
+set_access turnserver /etc/yunohost/certs/$domain/key.pem
+set_access turnserver /etc/yunohost/certs/$domain/dh.pem
 
 # Ouvre le port dans le firewall
 sudo yunohost firewall allow --no-upnp TCP $synapse_tls_port > /dev/null 2>&1
diff --git a/scripts/upgrade b/scripts/upgrade
index f8b8dec..27e402c 100644
--- a/scripts/upgrade
+++ b/scripts/upgrade
@@ -37,6 +37,15 @@ sudo sed -i "s@__TLS_PORT__@$synapse_tls_port@g" /etc/matrix-synapse/homeserver.
 sudo sed -i "s@__TURNSERVER_TLS_PORT__@$turnserver_tls_port@g" /etc/matrix-synapse/homeserver.yaml
 sudo sed -i "s@__TURNPWD__@$turnserver_pwd@g" /etc/matrix-synapse/homeserver.yaml
 
+# Configure access for certificates
+set_access matrix-synapse /etc/yunohost/certs/$domain/crt.pem
+set_access matrix-synapse /etc/yunohost/certs/$domain/key.pem
+set_access matrix-synapse /etc/yunohost/certs/$domain/dh.pem
+
+set_access turnserver /etc/yunohost/certs/$domain/crt.pem
+set_access turnserver /etc/yunohost/certs/$domain/key.pem
+set_access turnserver /etc/yunohost/certs/$domain/dh.pem
+
 if [ "$is_public" = "0" ]
 then
     sudo sed -i "s@__ALLOWED_ACCESS__@False@g" /etc/matrix-synapse/homeserver.yaml