tech review feedback

Author: Amrita42

concepts/about-fqdn.xml

@@ -47,18 +47,7 @@ A FQDN is the absolute and unambiguous address of that host on the internet. It
 <listitem><para>DNS serves as the internet's directory by translating human-readable names into machine-accessible IP addresses to facilitate cross-network communication. FQDNs are the essential components of this process, providing the absolute, unambiguous paths required for DNS queries and responses to accurately resolve hostnames to their specific numerical destinations.</para></listitem>
 </itemizedlist>
 </section>
-<section xml:id="usage-fqdn">
-  <title>Why you need FQDNs?</title>
-  <para>Some of the use case scenarios include:</para>
-  <itemizedlist>
- <listitem><para>To make a device accessible over the internet, a FQDN is required. You have to use the FQDN to configure your DNS records, which maps the domain name to the device's static IP address. </para></listitem>
- <listitem><para>An FQDN is also a prerequisite for SSL certification. To meet current web security standards, you must use a verified domain name to issue and manage your site’s encryption certificates. </para></listitem>
- <listitem><para>In large-scale networking, FQDNs are indispensable for segmenting and managing complex environments.They provide a hierarchical structure that allows administrators to organize traffic into distinct and secure zones.
-  By using specific host names within a structured domain hierarchy, organizations can implement granular access controls and streamline service discovery, ensuring that data flows efficiently and remains isolated within its intended network segment. </para></listitem>
- <listitem><para>Whether you are establishing a connection for FTP file transfers or configuring email services for specific applications, a FQDN or IP address is required to properly route and authenticate the traffic.</para></listitem>
- </itemizedlist>
-  </section>
-  <section xml:id="certs-fqdn">
+<section xml:id="certs-fqdn">
     <title>About FQDNs and SSL/TLS certificates</title>
     <para>A FQDN is a fundamental requirement for obtaining SSL/TLS certificates, which safeguard online communications by encrypting data transmitted between servers and clients.
       By providing a specific FQDN to a Certificate Authority (CA), you ensure the resulting certificate is mathematically bound to your exact domain, authenticating your site's identity and preventing unauthorized third parties from intercepting or spoofing your traffic.</para>

references/configure-fqdn.xml

@@ -33,9 +33,9 @@ Note that &systemd; uses the content of the <filename>/etc/hostname</filename> f
 <para>To configure FQDN, you can use the command-line or directly edit the specific files.</para>
 <itemizedlist>
 <listitem><para>To configure a FQDN on a &sles; 16 system, run:</para>
-<screen>&prompt.sudo; <command> hostnamectl set-hostname <replaceable>HOST_NAME</replaceable></command></screen>
+<screen>&prompt.sudo; <command> hostnamectl hostname <replaceable>HOST_NAME</replaceable></command></screen>
 <para>For example:</para>
-<screen>&prompt.sudo; <command> hostnamectl set-hostname localhost </command></screen>
+<screen>&prompt.sudo; <command> hostnamectl hostname localhost </command></screen>
 </listitem>
 <listitem><para>Edit the files:</para>
 <itemizedlist>