Add Workflows/Linux/Expand XFS Filesystem.md

Workflows/Linux/Expand XFS Filesystem.md

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+**Purpose**:
+The purpose of this workflow is to illustrate the process of expanding storage for a Linux server acting as a GuestVM.  We want the VM to have more storage space, so this document will go over the steps to expand that usable space.
+
+!!! info "Assumptions"
+    It is assumed you are using a RHEL variant of linux such as Rocky Linux.  This should apply to any version of Linux, but was written in a Rocky Linux 9.4 lab environment.
+
+    This document also assumes you did not enable Logical Volume Management (LVM) when deploying your server.  If you did, you will need to perform additional (undocumented) LVM-specific steps after increasing the space following this document.
+
+## Increase GuestVM Virtual Disk Size
+This part should be fairly straight-forward.  Using whatever hypervisor is running the Linux GuestVM, expand the disk space of the disk to the desired size.
+
+## Extend Partition Table
+This step goes over how to increase the usable space of the virtual disk within the GuestVM itself after it was expanded.
+
+!!! warning "Be Careful"
+    When you follow these steps, you will be deleting the existing partition and immediately re-creating it.  If you do not use the **EXACT SAME** starting sector for the new partition, you will destroy data.
+
+``` sh
+sudo dnf install gdisk -y
+gdisk /dev/<diskNumber> # (1)
+p <ENTER> # (2)
+d <ENTER> # (3)
+```
+
+1.  The first command needs you to enter the disk identifier.  In most cases, this will likely be the first disk, such as `/dev/sda`.  You do not need to indicate a partition number in this step, as you will be asked for one in a later step after identifying all of the partitions on this disk in the next command.
+2.  This will list all of the partitions on the disk.
+3.  This will ask you for a partition number to delete.  Generally this is the last partition number listed.  In the example below, you would type `4` then press <ENTER> to schedule the deletion of the partition.
+    ```
+    Command (? for help): p
+    Disk /dev/sda: 2147483648 sectors, 1024.0 GiB
+    Model: Virtual Disk
+    Sector size (logical/physical): 512/4096 bytes
+    Disk identifier (GUID): 8A5C2469-B07B-42AC-8E57-E756E62D37D1
+    Partition table holds up to 128 entries
+    Main partition table begins at sector 2 and ends at sector 33
+    First usable sector is 34, last usable sector is 2147483614
+    Partitions will be aligned on 2048-sector boundaries
+    Total free space is 1073743838 sectors (512.0 GiB)
+
+    Number  Start (sector)    End (sector)  Size       Code  Name
+    1            2048         1230847   600.0 MiB   EF00  EFI System Partition
+    2         1230848         3327999   1024.0 MiB  8300
+    3         3328000        19826687   7.9 GiB     8200
+    4        19826688      1073741790   502.5 GiB   8300  Linux filesystem
+    ```