diff --git a/keep-udp2raw-alive.md b/keep-udp2raw-alive.md
index 9541d1c..36130dc 100644
--- a/keep-udp2raw-alive.md
+++ b/keep-udp2raw-alive.md
@@ -1,5 +1,7 @@
 a simple method to keep udp2raw alive, in the case udp2raw quit
 
+(This is actually basic linux usage, which is out of scope of udp2raw. I am keeping it here as a friendly reminder)
+
 #### create run.sh
 save the below content as run.sh
 ```