diff --git a/bin/yunohost b/bin/yunohost
index a5fadf574..3f947364b 100755
--- a/bin/yunohost
+++ b/bin/yunohost
@@ -66,6 +66,10 @@ def _parse_cli_args():
         action='store_true', default=False,
         help="Don't produce any output",
     )
+    parser.add_argument('--admin-password',
+        default=None, dest='password', metavar='PASSWORD',
+        help="The admin password to use to authenticate",
+    )
     # deprecated arguments
     parser.add_argument('--plain',
         action='store_true', default=False, help=argparse.SUPPRESS
@@ -199,6 +203,6 @@ if __name__ == '__main__':
     from moulinette import cli
     ret = cli(_retrieve_namespaces(), args,
             use_cache=opts.use_cache, output_as=opts.output_as,
-            parser_kwargs={'top_parser': parser}
+            password=opts.password, parser_kwargs={'top_parser': parser}
     )
     sys.exit(ret)
diff --git a/data/apps/helpers.d/filesystem b/data/apps/helpers.d/filesystem
index c3332a794..087a9e944 100644
--- a/data/apps/helpers.d/filesystem
+++ b/data/apps/helpers.d/filesystem
@@ -27,3 +27,15 @@ ynh_bind_or_cp() {
     fi
     $SUDO_CMD cp -r "$SRCDIR" "$DESTDIR"
 }
+
+# Create a directory under /tmp
+#
+# usage: ynh_mkdir_tmp
+# | ret: the created directory path
+ynh_mkdir_tmp() {
+    TMPDIR="/tmp/$(ynh_string_random 6)"
+    while [ -d $TMPDIR ]; do
+        TMPDIR="/tmp/$(ynh_string_random 6)"
+    done
+    mkdir -p "$TMPDIR" && echo "$TMPDIR"
+}
diff --git a/data/apps/helpers.d/setting b/data/apps/helpers.d/setting
new file mode 100644
index 000000000..14d47c133
--- /dev/null
+++ b/data/apps/helpers.d/setting
@@ -0,0 +1,18 @@
+# Get an application setting
+#
+# usage: ynh_app_setting_get app key
+# | arg: app - the application id
+# | arg: key - the setting to get
+ynh_app_setting_get() {
+    sudo yunohost app setting "$1" "$2" --output-as plain
+}
+
+# Set an application setting
+#
+# usage: ynh_app_setting_set app key value
+# | arg: app - the application id
+# | arg: key - the setting name to set
+# | arg: value - the setting value to set
+ynh_app_setting_set() {
+    sudo yunohost app setting "$1" "$2" -v "$3"
+}