Powershell command for Creating a VM instance from VM Image:

For Windows



New-AzureQuickVM -Windows

                 -Location "<LocationName>"

                 -ServiceName "<CloudServiceName>"

                 -Name "<VMName>"

                 -InstanceSize "<InstanceSize>"

                 -ImageName "<ImageName>"

                 -AdminUserName "<UserName>"

                 -Password "<Password>"

                 -WaitForBoot 



FOR Linux



New-AzureQuickVM -Linux

                 -Location "<LocationName>"

                 -ServiceName "<CloudServiceName>"

                 -Name "<VMName>"

                 -InstanceSize "<InstanceSize>"

                 -ImageName "<ImageName>"

                 -LinuxUser"<UserName>"

                 -Password "<Password>"

                 -WaitForBoot