diff --git a/docker/README.md b/docker/README.md
index 2eac819..e561d42 100644
--- a/docker/README.md
+++ b/docker/README.md
@@ -88,4 +88,18 @@
 
   
 
-* s
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+* user permission
+
+```shell
+// create docker group
+$ sudo groupadd docker
+
+// add current user to group
+$ sudo usermod -aG docker ${USER}
+
+// reboot system for group privillege to take effect
+
+// test run
+$ docker run hello-world
+
+```
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