Merge pull request #232649 from divargas-msft/patch-4

[Doc-a-thon] Updating cloudinit-configure-swapfile

Author: v-shils

articles/virtual-machines/linux/cloudinit-configure-swapfile.md

@@ -5,22 +5,23 @@ author: mattmcinnes
 ms.service: virtual-machines
 ms.collection: linux
 ms.topic: how-to
-ms.date: 11/29/2017
+ms.date: 03/29/2023
 ms.author: mattmcinnes
 ms.subservice: cloud-init
 ---
 # Use cloud-init to configure a swap partition on a Linux VM
 
 **Applies to:** :heavy_check_mark: Linux VMs :heavy_check_mark: Flexible scale sets 
 
-This article shows you how to use [cloud-init](https://cloudinit.readthedocs.io) to configure the swap partition on various Linux distributions. The swap partition was traditionally configured by the Linux Agent (WALA) based on which distributions required one.  This document will outline the process for building the swap partition on demand during provisioning time using cloud-init.  For more information about how cloud-init works natively in Azure and the supported Linux distros, see [cloud-init overview](using-cloud-init.md)
+This article shows you how to use [cloud-init](https://cloudinit.readthedocs.io) to configure the swap partition on various Linux distributions. The swap partition was traditionally configured by the Linux Agent (WALA) based on which distributions required one.  This document outlines the process for building the swap partition on demand during provisioning time using cloud-init.  For more information about how cloud-init works natively in Azure and the supported Linux distros, see [cloud-init overview](using-cloud-init.md)
 
 ## Create swap partition for Ubuntu based images
+
 By default on Azure, Ubuntu gallery images do not create swap partitions. To enable swap partition configuration during VM provisioning time using cloud-init - please see the [AzureSwapPartitions document](https://wiki.ubuntu.com/AzureSwapPartitions) on the Ubuntu wiki.
 
 ## Create swap partition for Red Hat and CentOS based images
 
-Create a file in your current shell named *cloud_init_swappart.txt* and paste the following configuration. For this example, create the file in the Cloud Shell not on your local machine. You can use any editor you wish. Enter `sensible-editor cloud_init_swappart.txt` to create the file and see a list of available editors. Choose #1 to use the **nano** editor. Make sure that the whole cloud-init file is copied correctly, especially the first line.  
+Create a file in your current shell named *cloud_init_swappart.txt* and paste the following configuration. For this example, create the file in the Cloud Shell not on your local machine. You can use any editor you wish. Make sure that the whole cloud-init file is copied correctly, especially the first line.  
 
 ```yaml
 #cloud-config
@@ -43,47 +44,52 @@ The mount is created with the `nofail` option to ensure that the boot will conti
 
 Before deploying this image, you need to create a resource group with the [az group create](/cli/azure/group) command. An Azure resource group is a logical container into which Azure resources are deployed and managed. The following example creates a resource group named *myResourceGroup* in the *eastus* location.
 
-```azurecli-interactive 
+```azurecli-interactive
 az group create --name myResourceGroup --location eastus
 ```
 
 Now, create a VM with [az vm create](/cli/azure/vm) and specify the cloud-init file with `--custom-data cloud_init_swappart.txt` as follows:
 
-```azurecli-interactive 
+```azurecli-interactive
 az vm create \
   --resource-group myResourceGroup \
-  --name centos74 \
-  --image OpenLogic:CentOS:7-CI:latest \
+  --name vmName \
+  --image imageCIURN \
   --custom-data cloud_init_swappart.txt \
   --generate-ssh-keys 
 ```
 
+> [!NOTE]
+> Replace **myResourceGroup**, **vmName**, and **imageCIURN** values accordingly. Make sure an image with Cloud-init is chosen.
+
 ## Verify swap partition was created
-SSH to the public IP address of your VM shown in the output from the preceding command. Enter your own **publicIpAddress** as follows:
+
+SSH to the public IP address of your VM shown in the output from the preceding command. Enter your own **user** and **publicIpAddress** as follows:
 
 ```bash
-ssh <publicIpAddress>
+ssh <user>@<publicIpAddress>
 ```
 
 Once you have SSH'ed into the vm, check if the swap partition was created
 
 ```bash
-swapon -s
+sudo swapon -s
 ```
 
 The output from this command should look like this:
 
-```text
+```output
 Filename                Type        Size    Used    Priority
 /dev/sdb2  partition   2494440 0   -1
 ```
 
-> [!NOTE] 
-> If you have an existing Azure image that has a swap partition configured and you want to change the swap partition configuration for new images, you should remove the existing swap partition. Please see 'Customize Images to provision by cloud-init' document for more details.
+> [!NOTE]
+> If you have an existing Azure image that has a swap partition configured and you want to change the swap partition configuration for new images, you should remove the existing swap partition. Please see [Customize Images to provision by cloud-init](/azure/virtual-machines/linux/tutorial-automate-vm-deployment) document for more details.
 
 ## Next steps
+
 For additional cloud-init examples of configuration changes, see the following:
- 
+
 - [Add an additional Linux user to a VM](cloudinit-add-user.md)
 - [Run a package manager to update existing packages on first boot](cloudinit-update-vm.md)
 - [Change VM local hostname](cloudinit-update-vm-hostname.md)