diff --git a/README.md b/README.md
index f5e0a24..b38a5b9 100644
--- a/README.md
+++ b/README.md
@@ -85,7 +85,7 @@ Notes:
 
 - Use `nohup` or `disown` if you want a background process to keep running forever.
 
-- Check what processes are listening via `ss -plat`.
+- Check what processes are listening via `netstat -lntp` or `ss -plat` (for TCP; add `-u` for for UDP).
 
 - See also `lsof` for open sockets and files.