New guide: Regenerate initramfs (#2478)

Also add `kernel` section.

docs/guides/.pages

@@ -21,6 +21,7 @@ nav:
     - File Sharing Services: file_sharing
     - Hardware: hardware
     - Interoperability: interoperability
+    - Kernel: kernel
     - Mirror Management: mirror_management
     - Network: network
     - Package Management: package_management

docs/guides/kernel/regenerate_initramfs.md

@@ -0,0 +1,48 @@
+---
+title: Regenerate initramfs
+author: Neel Chauhan
+contributors:
+tested_with: 9.4
+tags:
+  - hardware
+---
+
+# Regenerate initramfs
+
+## Introduction
+
+An `initramfs` is the root filesystem inside a Linux kernel to help boot the system. It contains the core modules needed to boot Linux.
+
+Sometimes, an Linux administrator might want to regenerate the `initramfs`, say if they want to blacklist a driver or include a out-of-band module. For instance, the author did this to [enable Intel vPro on a Minisforum MS-01](https://spaceterran.com/posts/step-by-step-guide-enabling-intel-vpro-on-your-minisforum-ms-01-bios/).
+
+## Requirements
+
+The following are the minimum requirements for using this procedure:
+
+* A Rocky Linux system or virtual machine (not a container)
+
+* Changes to the kernel setup, such as blacklisting or adding a module
+
+## Regenerating the `initramfs`
+
+To regenerate the `initramfs` you should first back up the existing `initramfs`:
+
+```bash
+cp /boot/initramfs-$(uname -r).img /boot/initramfs-$(uname -r)-$(date +%m-%d-%H%M%S).img
+```
+
+Next, run `dracut` to regenerate the `initramfs`:
+
+```bash
+dracut -f /boot/initramfs-$(uname -r).img $(uname -r)
+```
+
+Subsequently, reboot:
+
+```bash
+reboot
+```
+
+## Conclusion
+
+The Linux kernel is extremely powerful and modular. It makes sense that some users may want to allow or disallow certain modules, and regenerating the `initramfs` allows for this to happen. So cheers, you regenerated yours!