diff --git a/Create-DevTerm-CM3-OS-image-from-scratch.md b/Create-DevTerm-CM3-OS-image-from-scratch.md
index d492581..3d3a0b1 100644
--- a/Create-DevTerm-CM3-OS-image-from-scratch.md
+++ b/Create-DevTerm-CM3-OS-image-from-scratch.md
@@ -19,7 +19,7 @@ sudo mount --bind /dev dev/
 sudo mount --bind /sys sys/
 sudo mount --bind /proc proc/
 sudo mount --bind /dev/pts dev/pts
-sudo mv etc/ld.so.preload etc/ld_so_preload
+#sudo mv etc/ld.so.preload etc/ld_so_preload
 sudo chroot .
 ```
 
@@ -71,7 +71,7 @@ in `/boot/cmdline.txt` ,add `fbcon=rotate:1`, remove `quiet`
 ### Now quit the chroot env
 ```
 exit
-sudo mv etc/ld_so_preload etc/ld.so.preload
+#sudo mv etc/ld_so_preload etc/ld.so.preload
 
 sudo umount /mnt/p2/dev/pts
 sudo umount /mnt/p2/dev
@@ -79,11 +79,11 @@ sudo umount /mnt/p2/proc
 sudo umount /mnt/p2/sys
 ##clear bash 
 sudo rm -rf root/.bash_history
-sudo rm usr/bin/qemu-arm-static
+#sudo rm usr/bin/qemu-arm-static
 
 cd -
-sudo umount /mnt/p2/
-sudo umount /mnt/p1
+sudo umount /mnt/p2/boot
+sudo umount /mnt/p2
 
 ```