diff --git a/prebuilds/usr/local/sbin/download_pkg b/prebuilds/usr/local/sbin/download_pkg
index 3d41a0d..44f61e0 100755
--- a/prebuilds/usr/local/sbin/download_pkg
+++ b/prebuilds/usr/local/sbin/download_pkg
@@ -2,7 +2,7 @@
 # Ver: 1.2 by Endial Fang (endial@126.com)
 # 
 # shell 执行参数，分别为 -e(命令执行错误则退出脚本) -u(变量未定义则报错) -x(打印实际待执行的命令行)
-set -eux
+set -eu
 
 # 定义错误处理函数，添加错误位置信息
 error() {
@@ -123,7 +123,7 @@ if [ -e "$cache_root/$package" ]; then
     echo "Package already exists in cache: $cache_root/$package"
 else
     cd $install_root
-    echo "Downloading $package package"
+    echo "Downloading $package package..."
     for url in $package_urls; do
       echo "Try $url/$package"
         if wget -T 10 -O "$cache_root/$package" "$url/$package" && [ -s "$cache_root/$package" ]; then
diff --git a/prebuilds/usr/local/sbin/install_pkg b/prebuilds/usr/local/sbin/install_pkg
index 46f7bee..fbd92a0 100755
--- a/prebuilds/usr/local/sbin/install_pkg
+++ b/prebuilds/usr/local/sbin/install_pkg
@@ -2,7 +2,7 @@
 # Ver: 1.2 by Endial Fang (endial@126.com)
 # 
 # shell 执行参数，分别为 -e(命令执行错误则退出脚本) -u(变量未定义则报错) -x(打印实际待执行的命令行)
-set -eux
+set -eu
 
 # 检查用户权限
 if [ "$EUID" -ne 0 ]; then
@@ -48,6 +48,7 @@ export DEBIAN_FRONTEND=noninteractive &&
 until [ $retry -gt $max ]; do
     set +e
     (
+        echo "Update and install packages..." &&
         apt-get update &&
         apt-get install -y --no-install-recommends $*
     )
diff --git a/prebuilds/usr/local/sbin/select_source b/prebuilds/usr/local/sbin/select_source
index 448aa20..7389789 100755
--- a/prebuilds/usr/local/sbin/select_source
+++ b/prebuilds/usr/local/sbin/select_source
@@ -3,7 +3,7 @@
 # 
 # 此脚本用于根据传入的参数选择对应的 apt 源配置文件并复制到指定目录
 # shell 执行参数，分别为 -e(命令执行错误则退出脚本) -u(变量未定义则报错) -x(打印实际待执行的命令行)
-set -eux
+set -eu
 
 # 检查是否有足够的权限
 if [ "$EUID" -ne 0 ]; then