Update Red Hat instructions & Java support information (#495)

* Update redhat & java support information

* apply feedback from Mark's review

* Fix spelling of AlmaLinux

* End paragraph for consistency

* Update formatting for more popular usage

* adjust formatting

---------

Co-authored-by: Mark Waite <[email protected]>

Author: kmartens27

templates/header.redhat.html

@@ -3,31 +3,17 @@
 {% block distribution_instruction %}
 
   <p>
-  To use this repository, run the following command:
-
-  <pre class="text-white bg-dark">
-
-  sudo wget -O /etc/yum.repos.d/{{artifactName}}.repo {{ web_url }}/{{artifactName}}.repo
-  sudo rpm --import {{ web_url }}/{{organization}}-2023.key
-  </pre>
-
-  <p>
-  If you've previously imported the key from Jenkins, the <code>rpm --import</code> will fail because
-  you already have a key. Please ignore that and move on.
-
-  <pre class="text-white bg-dark">
-
-  yum install fontconfig java-17-openjdk
-  yum install {{artifactName}}
-  </pre>
+  To install Jenkins on Red Hat Enterprise Linux, AlmaLinux, Rocky Linux, Oracle Linux, or another Red
+  Hat based distribution, you can utilize the instructions provided in our <a
+  href="https://www.jenkins.io/doc/book/installing/linux/#red-hat-centos">Red Hat Enterprise Linux installation
+  guide.</a>
+  </p>
 
   <p>
-  The rpm packages were signed using this key:
+  To install Jenkins on Fedora, use the instructions provided in our
+  <a href="https://www.jenkins.io/doc/book/installing/linux/#fedora">Fedora installation guide</a>.
   </p>
 
-  <pre class="text-white bg-dark" style="box-sizing:border-box; padding:1.5rem 1rem;">{{ pub_key_info|trim }}</pre>
-
-
 {% endblock %}
 
 {% block  individual_package_instruction  %}

templates/header.war.html

@@ -13,64 +13,10 @@
     e.g. <a href="https://adoptium.net/">Eclipse Temurin</a>.
   </p>
 
-  <h2>
-    Weekly Release Line
-  </h2>
-
   <p>
-    Supported Java versions for the weekly release line are:
+    To determine the Java version that is supported for your Jenkins environment, please refer to the <a href="https://www.jenkins.io/doc/book/platform-information/support-policy-java/#running-jenkins-system">Java support policy.</a>
   </p>
 
-  <dl>
-    <dt>2.463 (June 2024) and newer</dt>
-    <dd>Java 17 or Java 21</dd>
-
-    <dt>2.419 (August 2023) and newer</dt>
-    <dd>Java 11, Java 17, or Java 21</dd>
-
-    <dt>2.357 (June 2022) and newer</dt>
-    <dd>Java 11 or Java 17</dd>
-
-    <dt>2.164 (February 2019) and newer</dt>
-    <dd>Java 8 or Java 11</dd>
-
-    <dt>2.54 (April 2017) and newer</dt>
-    <dd>Java 8</dd>
-
-    <dt>1.612 (May 2015) and newer</dt>
-    <dd>Java 7</dd>
-  </dl>
-
-  <h2>
-    <a href="https://www.jenkins.io/download/lts/">Long Term Support (LTS)</a> Release Line
-  </h2>
-
-  <p>
-    Supported Java versions for the LTS release line are:
-  </p>
-
-  <dl>
-     <dt>2.479.1 (October 2024) and newer</dt>
-     <dd>Java 17 or Java 21</dd>
-
-     <dt>2.426.1 (November 2023) and newer</dt>
-     <dd>Java 11, Java 17 or Java 21</dd>
-
-    <dt>2.361.1 (September 2022) and newer</dt>
-    <dd>Java 11 or Java 17</dd>
-
-    <dt>2.346.1 (June 2022) and newer</dt>
-    <dd>Java 8, Java 11, or Java 17</dd>
-
-    <dt>2.164.1 (March 2019) and newer</dt>
-    <dd>Java 8 or Java 11</dd>
-
-    <dt>2.60.1 (June 2017) and newer</dt>
-    <dd>Java 8</dd>
-
-    <dt>1.625.1 (October 2015) and newer</dt>
-    <dd>Java 7</dd>
-  </dl>
 {% endblock %}
 
 {% block  individual_package_instruction  %}