diff --git a/debian/upgrade.sh b/debian/upgrade.sh
index 16235ee..1a1a770 100644
--- a/debian/upgrade.sh
+++ b/debian/upgrade.sh
@@ -13,14 +13,14 @@ export NEEDRESTART_MODE=a
 apt install -y unattended-upgrades
 
 # 配置自动更新并在凌晨2点自动重启
-cat << EOF | tee /etc/apt/apt.conf.d/50unattended-upgrades
+cat <<EOF | tee /etc/apt/apt.conf.d/50unattended-upgrades
 Unattended-Upgrade::Automatic-Reboot "true";
 Unattended-Upgrade::Automatic-Reboot-WithUsers "true";
 Unattended-Upgrade::Automatic-Reboot-Time "02:00";
 EOF
 
 # 配置 needrestart 为非交互式
-cat << EOF | tee /etc/needrestart/conf.d/50noninteractive.conf
+cat <<EOF | tee /etc/needrestart/conf.d/50noninteractive.conf
 \$nrconf{restart} = 'a';
 \$nrconf{kernelhints} = -1;
 EOF
@@ -28,16 +28,15 @@ EOF
 # 启用自动更新
 dpkg-reconfigure -plow unattended-upgrades
 
-apt -qq update &&
-  apt -qq upgrade -y &&
-  apt -qq full-upgrade -y &&
-  apt -qq autoremove &&
-  apt -qq autoclean &&
-  apt clean &&
-  systemctl --failed &&
-  apt -qq install needrestart -y &&
-  needrestart -r a
-
+apt -qq update
+apt -qq upgrade -y
+apt -qq full-upgrade -y
+apt -qq autoremove
+apt -qq autoclean
+apt clean
+systemctl --failed
+apt -qq install needrestart -y
+needrestart -r a
 
 ################################################################################
 # needrestart --help
@@ -85,4 +84,4 @@ apt -qq update &&
 #     -w          check for obsolete CPU microcode
 
 #     --help      show this help
-#     --version   show version information
\ No newline at end of file
+#     --version   show version information