diff --git a/note/grub_menuentry.txt b/note/grub_menuentry.txt
new file mode 100644
index 0000000..bb62e60
--- /dev/null
+++ b/note/grub_menuentry.txt
@@ -0,0 +1,7 @@
+menuentry "ubuntu-20.04.2.0-desktop-amd64.iso" {
+  insmod ext2
+  set isofile="/ubuntu-20.04.2.0-desktop-amd64.iso"
+  loopback loop (hd0,5)$isofile
+  linux (loop)/casper/vmlinuz boot=casper iso-scan/filename=$isofile quiet noeject noprompt splash
+  initrd (loop)/casper/initrd
+}