diff --git a/user.list b/user.list
new file mode 100644
index 0000000..1d03aac
--- /dev/null
+++ b/user.list
@@ -0,0 +1,9 @@
+
+This file lists all users and groups that have reserved uid/gid and are
+created using ansible rules. If a user/group pair is created, they share
+the same uid/gid. If a user is member of a system group, leave the group
+entry empty. If only a group is created, leave the user entry empty.
+
+id    user               group             notes
+-------------------------------------------------------------------------------
+1001  mirror             mirror