diff --git a/Create-DevTerm-R01-OS-image-from-scratch.md b/Create-DevTerm-R01-OS-image-from-scratch.md
index 83fb544..61660b4 100644
--- a/Create-DevTerm-R01-OS-image-from-scratch.md
+++ b/Create-DevTerm-R01-OS-image-from-scratch.md
@@ -250,6 +250,7 @@ sudo tar xpjfv ubuntu-21.04-preinstalled-server-riscv64+unmatched_rootfs.tar.bz2
 ```
 
 ## chroot part
+```
 sudo mount /dev/loop1p3 /mnt/p4/boot
 cd /mnt/p4
 
@@ -258,7 +259,7 @@ sudo mount --bind /sys sys/
 sudo mount --bind /proc proc/
 sudo mount --bind /dev/pts dev/pts
 sudo chroot .
-
+```
 ### upgrade to devel 
 now we are in chroot  
 ```