diff --git a/tools/grub_auto_install.sh b/tools/grub_auto_install.sh
index 6d0432fb..31f05b75 100644
--- a/tools/grub_auto_install.sh
+++ b/tools/grub_auto_install.sh
@@ -9,7 +9,7 @@ mkdir -p ${grub_dir_x86_64_efi}
 
 
 #检测grub是否已经安装
-if [ -d ${grub_dir_i386_efi}/bin ] || [ -d ${grub_dir_i386_legacy}/bin ] && [ -d ${grub_dir_x86_64_efi}/bin ] ; then
+if [ -d ${grub_dir_i386_efi}/bin ] && [ -d ${grub_dir_i386_legacy}/bin ] && [ -d ${grub_dir_x86_64_efi}/bin ] ; then
 	exit 0
 fi
 #仅支持Ubuntu/Debain下的自动安装
diff --git a/tools/write_disk_image.sh b/tools/write_disk_image.sh
index 8acee777..12c326ca 100644
--- a/tools/write_disk_image.sh
+++ b/tools/write_disk_image.sh
@@ -37,7 +37,7 @@ bins[0]=${kernel}
 for file in ${bins[*]};do
 if [ ! -x $file ]; then
 echo "$file 不存在！"
-exit
+exit 
 fi
 done