diff --git a/tools/ubuntu.sh b/tools/ubuntu.sh
index 8d3d2d4..787aae1 100644
--- a/tools/ubuntu.sh
+++ b/tools/ubuntu.sh
@@ -17,3 +17,5 @@ sudo -s # Log as root
 cat /proc/<process_id>/maps   # Show the current virtual memory usage of a Linux process
 
 ip r # Display ip of the server
+
+lsof -i :9000 # List process running on port 9000