diff --git a/alpine-network.sh b/alpine-network.sh
index 8514ebb..f1df98b 100644
--- a/alpine-network.sh
+++ b/alpine-network.sh
@@ -121,20 +121,18 @@ test_internet() {
     echo 'Testing Internet Connection...'
 
     for i in $(seq 5); do
-        {
-            if is_need_test_ipv4 && nslookup www.qq.com $ipv4_dns1; then
-                echo "IPv4 has internet."
-                ipv4_has_internet=true
-            fi
-            if is_need_test_ipv6 && nslookup www.qq.com $ipv6_dns1; then
-                echo "IPv6 has internet."
-                ipv6_has_internet=true
-            fi
-            if ! is_need_test_ipv4 && ! is_need_test_ipv6; then
-                break
-            fi
-            sleep 1
-        } >/dev/null 2>&1
+        if is_need_test_ipv4 && nslookup www.qq.com $ipv4_dns1 2>/dev/null; then
+            echo "IPv4 has internet."
+            ipv4_has_internet=true
+        fi
+        if is_need_test_ipv6 && nslookup www.qq.com $ipv6_dns1 2>/dev/null; then
+            echo "IPv6 has internet."
+            ipv6_has_internet=true
+        fi
+        if ! is_need_test_ipv4 && ! is_need_test_ipv6; then
+            break
+        fi
+        sleep 1
     done
 }
 
diff --git a/cloud-init.yaml b/cloud-init.yaml
index 8107be2..5462d65 100644
--- a/cloud-init.yaml
+++ b/cloud-init.yaml
@@ -21,4 +21,4 @@ runcmd:
   - systemctl restart sshd
   - touch /etc/cloud/cloud-init.disabled
   # ubuntu 镜像运行 echo -e '\nDone' ，-e 会被显示出来
-  - printf '\n%s\n' 'done' >/dev/tty0 || true
+  - printf '\n%s\n' 'reinstall done' >/dev/tty0 || true
diff --git a/redhat.cfg b/redhat.cfg
index fda08cf..e3fc7db 100644
--- a/redhat.cfg
+++ b/redhat.cfg
@@ -1,4 +1,4 @@
-# shellcheck disable=2148
+# shellcheck disable=SC2148
 # 设置
 keyboard --vckeymap=us --xlayouts='us'
 lang en_US.UTF-8
@@ -41,7 +41,7 @@ releasever=$(awk -F: '{ print $5 }' </etc/system-release-cpe)
 # 提取 extra.confhome extra.mirrorlist extra.main_disk
 prefix=extra
 for var in $(grep -o "\b$prefix\.[^ ]*" /proc/cmdline | xargs); do
-    eval "$(echo $var | sed -E "s/$prefix\.([^=]*)=(.*)/\1='\2'/")"
+    eval "$(echo "$var" | sed -E "s/$prefix\.([^=]*)=(.*)/\1='\2'/")"
 done
 
 get_all_disks() {
@@ -69,7 +69,8 @@ echo "ignoredisk --only-use=$(get_xda)" >$include
 
 # 设置 tty
 include=/tmp/include-bootloader
-console_cmdline=$(wget $confhome/ttys.sh -O- | sh -s console=)
+# shellcheck disable=SC2154
+console_cmdline=$(wget "$confhome/ttys.sh" -O- | sh -s console=)
 echo "bootloader --append=\"$console_cmdline\"" >$include
 
 # 有 installer 分区，表示用了两步安装
@@ -79,7 +80,7 @@ if [ -e /dev/disk/by-label/installer ]; then
     # 1g内存下，安装器默认开启了zram ，但安装f38还是不够内存
     # 具体表现为不断重启安装界面，所以还要开启swap
     ram_size=$(lsmem -b 2>/dev/null | grep 'Total online memory:' | awk '{ print $NF/1024/1024 }')
-    if [ -z $ram_size ] || [ $ram_size -le 1024 ]; then
+    if [ -z "$ram_size" ] || [ "$ram_size" -le 1024 ]; then
         mount /dev/disk/by-label/installer /run/install/repo -o remount,rw
         swapfile=/run/install/repo/swapfile
         if command -v fallocate; then
@@ -169,11 +170,11 @@ if [ -e /dev/disk/by-label/installer ]; then
     # 提取 extra.localtest extra.confhome extra.mirrorlist
     prefix=extra
     for var in $(grep -o "\b$prefix\.[^ ]*" /proc/cmdline | xargs); do
-        eval "$(echo $var | sed -E "s/$prefix\.([^=]*)=(.*)/\1='\2'/")"
+        eval "$(echo "$var" | sed -E "s/$prefix\.([^=]*)=(.*)/\1='\2'/")"
     done
 
     cd /
-    curl -O $confhome/resize.sh
+    curl -O "$confhome/resize.sh"
     echo '@reboot root bash /resize.sh' >/etc/cron.d/resize
 fi
 %end
diff --git a/reinstall.sh b/reinstall.sh
index 16dbfe6..fc16cc4 100644
--- a/reinstall.sh
+++ b/reinstall.sh
@@ -1133,7 +1133,7 @@ install_grub_linux_efi() {
         grub_efi=grubx64.efi
     fi
 
-    # fedora x86_64 的 efi 无法识别 opensuse tumbleweed 的 xfs
+    # fedora 的 efi 无法识别 opensuse tumbleweed 的 xfs
     # opensuse tumbleweed aarch64 的 efi 无法识别 alpine 3.19 的内核
     if [ "$basearch" = aarch64 ]; then
         efi_distro=fedora
diff --git a/trans.sh b/trans.sh
index fbb89dc..0e4caaa 100644
--- a/trans.sh
+++ b/trans.sh
@@ -511,7 +511,7 @@ del_invalid_efi_entry() {
     while read -r line; do
         part_uuid=$(echo "$line" | awk -F ',' '{print $3}')
         efi_index=$(echo "$line" | grep_efi_index)
-        if ! lsblk -o PARTUUID | grep "$part_uuid"; then
+        if ! lsblk -o PARTUUID | grep -q "$part_uuid"; then
             echo "Delete invalid EFI Entry: $line"
             efibootmgr --quiet --bootnum "$efi_index" --delete-bootnum
         fi
@@ -2346,6 +2346,8 @@ EOF
         }
 EOF
     fi
+
+    cat "$grub_cfg"
 }
 
 # 脚本入口