diff --git a/README.md b/README.md
index 30308f2..df46a6b 100644
--- a/README.md
+++ b/README.md
@@ -11,6 +11,18 @@ Installation
 1. provision gitea-runner user, with home directory and clone this repo inside of it.
 1. Install docker-rootless, provision sid and gid ranges 
     /etc/subuid and /etc/subgid need configured
+```
+# as root:
+echo "gitea-runner:296608:65536" | tee -a /etc/subuid
+echo "gitea-runner:296608:65536" | tee -a /etc/subgid
+
+# and verify (su -l gitea-runner):
+id =u
+whoami
+grep ^$(whoami): /etc/subuid
+grep ^$(whoami): /etc/subgid
+```
+
 1. Install 3 systemd units, 2 user-level and 1-system level to run dbus, docker (rootless), and act_runner
 1. Install .bashrc or .profile config for user to connect to dbus, needed for systemd
 1. Start and enable the systemd units/services