diff --git a/ubuntu/networking.md b/ubuntu/networking.md
index cdb5bf9..e7e947d 100644
--- a/ubuntu/networking.md
+++ b/ubuntu/networking.md
@@ -7,4 +7,8 @@ sudo netstat --tcp --udp --listening --program
 sudo lsof +M -i4 -i6
 
 let's encrypt certbot instructions for apache:
-https://certbot.eff.org/lets-encrypt/ubuntubionic-apache
\ No newline at end of file
+https://certbot.eff.org/lets-encrypt/ubuntubionic-apache
+
+
+ip setup:
+https://help.ubuntu.com/lts/serverguide/network-configuration.html
\ No newline at end of file