diff --git a/Devterm-CM3-ubuntu-server-image.md b/Devterm-CM3-ubuntu-server-image.md
index 0e0450a..7d156a9 100644
--- a/Devterm-CM3-ubuntu-server-image.md
+++ b/Devterm-CM3-ubuntu-server-image.md
@@ -1,4 +1,6 @@
-ubuntu-21.04-preinstalled-server-armhf+raspi.img
+### Img file
+
+[ubuntu-21.04-preinstalled-server-armhf+raspi.img](https://cdimage.ubuntu.com/releases/21.04/release/ubuntu-21.04-preinstalled-server-armhf+raspi.img.xz)
 
 ### Prepare
 Edit /boot/cmdline.txt and /etc/fstab of this img