diff --git a/tools/auto_build_pkgs.sh b/tools/auto_build_pkgs.sh
index 5d28253924a8e2739c3b0a7592f2e9f300fe4f9f..9b9de72b8b7a0d487fdb13d65679e23fcdd11f0f 100644
--- a/tools/auto_build_pkgs.sh
+++ b/tools/auto_build_pkgs.sh
@@ -55,17 +55,17 @@ build_pkg()
         if [ $pkg_name == 'busybox' ]; then
             mkdir -p /root/rpmbuild/SOURCES
             rpm2cpio $src_dir/$rpm_name | cpio -idv -D /root/rpmbuild/SOURCES
-            cp -f $src_dir/* /root/rpmbuild/SOURCES
+            /usr/bin/cp $src_dir/* /root/rpmbuild/SOURCES
             busybox_src_pkg=$(rpmbuild -bs $src_dir/$pkg_name.spec | awk '{print $2}')
-            cp -f $busybox_src_pkg ./$src_dir/$rpm_name
+            /usr/bin/cp $busybox_src_pkg ./$src_dir/$rpm_name
         fi
     else
         local rpm_name=$pkg_name-$pkg_version$download_suffix
         mkdir -p /root/rpmbuild/SOURCES
-        cp -fr $work_dir/src/$pkg_name/* /root/rpmbuild/SOURCES/
-        cp -f $work_dir/src/$pkg_name/$pkg_name.spec $src_dir
+        /usr/bin/cp -r $work_dir/src/$pkg_name/* /root/rpmbuild/SOURCES/
+        /usr/bin/cp $work_dir/src/$pkg_name/$pkg_name.spec $src_dir
         rpmbuild -bs $src_dir/$pkg_name.spec
-        cp -f /root/rpmbuild/SRPMS/$rpm_name $src_dir
+        /usr/bin/cp /root/rpmbuild/SRPMS/$rpm_name $src_dir
     fi
 
     ###starting build###
diff --git a/tools/auto_make_rootfs.sh b/tools/auto_make_rootfs.sh
index 6c0fb6f7f8a03864581631988d312903ac9ca30d..69a5508cb5e01cd3d58b105452f8d8fb98c960f7 100644
--- a/tools/auto_make_rootfs.sh
+++ b/tools/auto_make_rootfs.sh
@@ -119,7 +119,7 @@ please check if all pkgs have been build succ, and then remove this file."
     mkdir -p $rootfs_dir/../arm32_repo
 
     ###create arm32_repo
-    find ${work_dir}/output | grep rpm$ | grep -v src | xargs -i cp -f {} $rootfs_dir/../arm32_repo
+    find ${work_dir}/output | grep rpm$ | grep -v src | xargs -i /usr/bin/cp {} $rootfs_dir/../arm32_repo
     createrepo $rootfs_dir/../arm32_repo
     cat << EOF > /etc/yum.repos.d/arm32_rootfs.repo
 [arm32_rootfs]