diff --git a/linux_os/guide/system/network/firewall_single_service_active/oval/shared.xml b/linux_os/guide/system/network/firewall_single_service_active/oval/shared.xml
index 0b34ebf54ec..b8254289c93 100644
--- a/linux_os/guide/system/network/firewall_single_service_active/oval/shared.xml
+++ b/linux_os/guide/system/network/firewall_single_service_active/oval/shared.xml
@@ -1,13 +1,7 @@
 <def-group>
   <!-- Check that exactly one firewall service is active -->
   <definition class="compliance" id="{{{ rule_id }}}" version="1">
-    <metadata>
-      <title>Ensure Only One Firewall Service is Active</title>
-      <affected family="unix">
-        <platform>multi_platform_all</platform>
-      </affected>
-      <description>Only one firewall service (ufw, iptables, or nftables) should be active.</description>
-    </metadata>
+    {{{ oval_metadata("Ensure Only One Firewall Service is Active") }}}
     <criteria>
         <criterion comment="exactly one firewall service is active" 
             test_ref="test_{{{ rule_id }}}_single_active_firewall"/>
diff --git a/linux_os/guide/system/network/firewall_single_service_active/tests/multiple.fail.sh b/linux_os/guide/system/network/firewall_single_service_active/tests/multiple.fail.sh
index 2d26611b842..6097d9e5f6a 100644
--- a/linux_os/guide/system/network/firewall_single_service_active/tests/multiple.fail.sh
+++ b/linux_os/guide/system/network/firewall_single_service_active/tests/multiple.fail.sh
@@ -1,4 +1,4 @@
-#!?bin/bash
+#!/bin/bash
 #
 # remediation = none
 
diff --git a/linux_os/guide/system/network/firewall_single_service_active/tests/none.fail.sh b/linux_os/guide/system/network/firewall_single_service_active/tests/none.fail.sh
index 52ad7034fd5..809898a6aae 100644
--- a/linux_os/guide/system/network/firewall_single_service_active/tests/none.fail.sh
+++ b/linux_os/guide/system/network/firewall_single_service_active/tests/none.fail.sh
@@ -1,4 +1,4 @@
-#!?bin/bash
+#!/bin/bash
 #
 # remediation = none
 
diff --git a/linux_os/guide/system/network/firewall_single_service_active/tests/single.pass.sh b/linux_os/guide/system/network/firewall_single_service_active/tests/single.pass.sh
index 1d181c5660b..2cc7697ae7a 100644
--- a/linux_os/guide/system/network/firewall_single_service_active/tests/single.pass.sh
+++ b/linux_os/guide/system/network/firewall_single_service_active/tests/single.pass.sh
@@ -1,4 +1,4 @@
-#!?bin/bash
+#!/bin/bash
 #
 # remediation = none