diff --git a/init_root.sh b/init_root.sh
index dc96771..8540b0c 100755
--- a/init_root.sh
+++ b/init_root.sh
@@ -163,7 +163,7 @@ configure_hostname() {
 
     if [[ $response =~ ^[Yy]$ ]]; then
         read -p "hostname: " new_hostname
-        echo $new_hostname | tee /etc/hostname > /dev/null
+        echo $new_hostname | tee /etc/hostname >/dev/null
     fi
 }
 
@@ -176,6 +176,8 @@ configure_timedate() {
 }
 
 configure_fail2ban() {
+    [ -f /etc/fail2ban/jail.local ] && return
+
     read -p "要配置 fail2ban 吗？[Y]: " response
 
     if [[ $response =~ ^[Yy]$ ]]; then
diff --git a/init_sudo.sh b/init_sudo.sh
index 1a15283..921d0e9 100755
--- a/init_sudo.sh
+++ b/init_sudo.sh
@@ -163,7 +163,7 @@ configure_hostname() {
 
     if [[ $response =~ ^[Yy]$ ]]; then
         read -p "hostname: " new_hostname
-        echo $new_hostname | sudo tee /etc/hostname > /dev/null
+        echo $new_hostname | sudo tee /etc/hostname >/dev/null
     fi
 }
 
@@ -176,6 +176,8 @@ configure_timedate() {
 }
 
 configure_fail2ban() {
+    [ -f /etc/fail2ban/jail.local ] && return
+
     read -p "要配置 fail2ban 吗？[Y]: " response
 
     if [[ $response =~ ^[Yy]$ ]]; then