creating vm from managed data disk - azure

Question

I have OS data in a managed azure data disk. I want to create a VM from this data disk. I tried using
az vm create --resource-group myResourceGroup --location eastus --name myVM \ --os-type linux --attach-os-disk myManagedDisk
The issue that I am facing is that the newly created vm is up and running, however when I try to connect to it via ssh using the IP address, I am unable to do so.
Also how do I give an username and password to this newly created VM? It says the --admin-username and --admin-password options are unavailable for this type of command?

Answer 1

It seems you can't login the new VM with original passwrod, please Reset Password via Azure portal, then use new Password to login it.
It says the --admin-username and --admin-password options are
unavailable for this type of command?
Yes, Azure does not support reset username and password for an existing OS disk.
If you want to reset username and password, maybe you should create a new image from this VM. Create new image will general this VM, and remove user settings, then you can't login that original VM, if you want create new VM image, backup that os disk first.
Update:
Please follow those steps to copy managed disk and create new VM:
1.Stop original VM, then create snapshot of that OS disk via Azure portal.
2.Use the snapshot to create an new disk.
3.Use New OS disk to create Azure VM.
#Provide the subscription Id of the subscription where managed disk exists
$sourceSubscriptionId='yourSourceSubscriptionId'
#Provide the name of your resource group where managed disk exists
$sourceResourceGroupName='mySourceResourceGroupName'
#Provide the name of the managed disk
$managedDiskName='myDiskName'
#Set the context to the subscription Id where Managed Disk exists
Select-AzureRmSubscription -SubscriptionId $sourceSubscriptionId
#Get the source managed disk
$managedDisk= Get-AzureRMDisk -ResourceGroupName $sourceResourceGroupName -DiskName $managedDiskName
#Provide the subscription Id of the subscription where managed disk will be copied to
#If managed disk is copied to the same subscription then you can skip this step
$targetSubscriptionId='yourTargetSubscriptionId'
#Name of the resource group where snapshot will be copied to
$targetResourceGroupName='myTargetResourceGroupName'
#Set the context to the subscription Id where managed disk will be copied to
#If snapshot is copied to the same subscription then you can skip this step
Select-AzureRmSubscription -SubscriptionId $targetSubscriptionId
$diskConfig = New-AzureRmDiskConfig -SourceResourceId $managedDisk.Id -Location $managedDisk.Location -CreateOption Copy
#Create a new managed disk in the target subscription and resource group
New-AzureRmDisk -Disk $diskConfig -DiskName $managedDiskName -ResourceGroupName $targetResourceGroupName