Merge pull request #190145 from justindavies/motd

Add MOTD

Author: PRMerger10

articles/aks/custom-node-configuration.md

@@ -129,6 +129,8 @@ The settings below can be used to tune the operation of the virtual memory (VM)
 | `transparentHugePageEnabled` | `always`, `madvise`, `never` | `always` | [Transparent Hugepages](https://www.kernel.org/doc/html/latest/admin-guide/mm/transhuge.html#admin-guide-transhuge) is a Linux kernel feature intended to improve performance by making more efficient use of your processor’s memory-mapping hardware. When enabled the kernel attempts to allocate `hugepages` whenever possible and any Linux process will receive 2-MB pages if the `mmap` region is 2 MB naturally aligned. In certain cases when `hugepages` are enabled system wide, applications may end up allocating more memory resources. An application may `mmap` a large region but only touch 1 byte of it, in that case a 2-MB page might be allocated instead of a 4k page for no good reason. This scenario is why it's possible to disable `hugepages` system-wide or to only have them inside `MADV_HUGEPAGE madvise` regions. | 
 | `transparentHugePageDefrag` | `always`, `defer`, `defer+madvise`, `madvise`, `never` | `madvise` | This value controls whether the kernel should make aggressive use of memory compaction to make more `hugepages` available. | 
 
+
+
 > [!IMPORTANT]
 > For ease of search and readability the OS settings are displayed in this document by their name but should be added to the configuration json file or AKS API using [camelCase capitalization convention](/dotnet/standard/design-guidelines/capitalization-conventions).
 
@@ -182,6 +184,28 @@ Add a new node pool specifying the Kubelet parameters using the JSON file you cr
 az aks nodepool add --name mynodepool1 --cluster-name myAKSCluster --resource-group myResourceGroup --kubelet-config ./kubeletconfig.json
 ```
 
+
+## Other configuration
+
+The settings below can be used to modify other Operating System settings.
+
+### Message of the Day
+
+Pass the ```--message-of-the-day``` flag with the location of the file to replace the Message of the Day on Linux nodes at cluster  creation or node pool creation.
+
+
+#### Cluster creation
+```azurecli
+az aks create --cluster-name myAKSCluster --resource-group myResourceGroup --message-of-the-day ./newMOTD.txt
+```
+
+#### Nodepool creation
+```azurecli
+az aks nodepool add --name mynodepool1 --cluster-name myAKSCluster --resource-group myResourceGroup --message-of-the-day ./newMOTD.txt
+```
+
+
+
 ## Next steps
 
 - Learn [how to configure your AKS cluster](cluster-configuration.md).