diff --git a/README.md b/README.md
index 4cbbd89..885e41a 100644
--- a/README.md
+++ b/README.md
@@ -14,7 +14,7 @@ Something about scripts
 - Support network auto configurations in bio-stack(have both IPv4 and IPv6 public address), after log into system, you don't have to config IPv6 address manually, only for Debian, DHCP.
 - You can modify architecture, mirror, firmware, ssh port, password etc. 
 - Friendly to low memory machine, for debian series, recommend RAM is above 512MB, for redhat series, recommend RAM is above 2GB.</b>
-- Ubuntu 22.04 has cancelled net boot start features, so this program don't support Ubuntu 22.04 and above reinstallation(source: https://www.reddit.com/r/Ubuntu/comments/uroape/is_there_a_netbootiso_equivalent_for_2204_jammy/).
+- Ubuntu 22.04 has cancelled net boot start features, so this program don't support Ubuntu 22.04 and above reinstallation. source: http://archive.ubuntu.com/ubuntu/dists/jammy/main/installer-amd64/current/legacy-images/: The Legacy Ubuntu Server Installer is no longer available.
 - South Korea debian official mirror(http://ftp.kr.debian.org/debian/) is usually crashed down, so I change recommend mirror for Jaist University https://www.jaist.ac.jp/index.html to replace it. Japan recommend debian mirror is from https://www.riken.jp/, a science research organization in Japan. America recommend debian mirror is from University of California, Berkeley: https://www.berkeley.edu/.
 - Completely  modified debian, such as support terminal files colorful displaying, permanently change dns server, disable expired certificates, add on a cute welcome introduction, pre-install many complements in preseeding progress, now enjoy a newly, comfortable, graceful debian experience!
 - Support grub2 boot file modify, it can switch debian to Redhat or switch Redhat to debian smoothly, in old version if you installed from debian to redhat, you will no more switch to debian.