diff --git a/board/phytium/common/post-custom-skeleton-ubuntu.sh b/board/phytium/common/post-custom-skeleton-ubuntu.sh
index ce87ed34..26414115 100755
--- a/board/phytium/common/post-custom-skeleton-ubuntu.sh
+++ b/board/phytium/common/post-custom-skeleton-ubuntu.sh
@@ -55,19 +55,20 @@ do_distrorfs_first_stage() {
         exit 1
     fi
 
-    mkdir -p $2/usr/local/bin
-    cp -f board/phytium/common/ubuntu-package-installer $RFSDIR/usr/local/bin/
+    sudo chown 0:0 $RFSDIR
+    sudo mkdir -p $2/usr/local/bin
+    sudo cp -f board/phytium/common/ubuntu-package-installer $RFSDIR/usr/local/bin/
     packages_list=board/phytium/common/$3
     [ ! -f $packages_list ] && echo $packages_list not found! && exit 1
 
     echo additional packages list: $packages_list
     if [ ! -d $RFSDIR/usr/aptpkg ]; then
-	mkdir -p $RFSDIR/usr/aptpkg
-	cp -f $packages_list $RFSDIR/usr/aptpkg
+	sudo mkdir -p $RFSDIR/usr/aptpkg
+	sudo cp -f $packages_list $RFSDIR/usr/aptpkg
     fi
 
-    mkdir -p $RFSDIR/etc
-    cp -f /etc/resolv.conf $RFSDIR/etc/resolv.conf
+    sudo mkdir -p $RFSDIR/etc
+    sudo cp -f /etc/resolv.conf $RFSDIR/etc/resolv.conf
 
     if [ ! -d $RFSDIR/debootstrap ]; then
         echo "testdeboot"
diff --git a/board/phytium/common/ubuntu-package-installer b/board/phytium/common/ubuntu-package-installer
index c5d05a2e..ef7a9738 100755
--- a/board/phytium/common/ubuntu-package-installer
+++ b/board/phytium/common/ubuntu-package-installer
@@ -30,6 +30,8 @@ do_distrorfs_second_stage() {
     # set default hostname
     echo localhost > /etc/hostname
 
+    test -f /proc/uptime || mount -t proc proc /proc
+
     # set apt sources list to install additional packages
     asl=/etc/apt/sources.list
     rm -f $asl
@@ -55,7 +57,6 @@ do_distrorfs_second_stage() {
 
     dpkg -l | grep linux-headers | cut -d ' ' -f3 | xargs dpkg --purge
 
-    test -f /proc/uptime || mount -t proc proc /proc
     test -f /dev/pts/ptmx || mount -t devpts devpts /dev/pts
 
     echo installed additional packages.