16 votes
Accepted

Does installing NTP mean I'm installing an NTP server?

Short answer: Usually, if you're installing an NTP daemon, you're installing the capability to both sync the local clock, and to provide time to clients over the network. However, there are some ...
Paul Gear's user avatar
  • 4,477
11 votes
Accepted

What is the the purpose of using paravirtualization if there is a hardware assisted virtualization?

Consider just the case of networking. To actually be useful in most cases, a VM needs to be able to communicate over the network. For that, the guest obviously has to see some sort of network ...
Austin Hemmelgarn's user avatar
6 votes

What is the the purpose of using paravirtualization if there is a hardware assisted virtualization?

Short answer: when augmented with guest-side drivers, modern hardware virtualization uses some form of paravirtualization for the most performance-intensive operations. Hence modern hypervisors ...
shodanshok's user avatar
  • 50.5k
6 votes
Accepted

VMWare - Lower the size of a disk

If you want to actually shrink the disk, this is quite difficult; even if you manage to switch the virtual disk to thin provisioning, it will still be treated as a 8 TB disk and the guest OS can ...
Massimo's user avatar
  • 71.3k
4 votes
Accepted

Azure Virtual Machine Images for Windows Server Standard Edition

The only valid reason to use Standard over Datacenter is saving on licensing costs. Which makes sense when you are actually buying the license to install the OS on your own hardware, but makes no ...
Massimo's user avatar
  • 71.3k
4 votes

Convert Physical Server 2008 R2 to VM

AFAIR, Starwinds V2V Converter has a Windows Repair Mode for converted images. It allows virtual machines to adapt to hardware automatically. Also, don't forget to put system into the maintenance mode....
Stuka's user avatar
  • 5,775
3 votes

Convert hard drive to Virtual Machine

(1) You use something like V2V Converter / P2V Migrator (depending on do you have an access to the disk image file or is it disk itself you need to deal with at block level). https://www....
BaronSamedi1958's user avatar
3 votes
Accepted

Does VM machine can replace physical machine,

Required note: I work for Dell @HBrujin's comment already has basically answered the question and is sufficiently thorough that it is worth repeating: Running one-one-one legacy RHEL virtually on a ...
Grant Curell's user avatar
  • 1,098
3 votes
Accepted

Using host loopback device into VMs

Because VM is another computer. It runs its own OS with its own networking stack and so on. From the networking standpoint, on the L1 (physical) it is tied to the host, but on the L2 (channel) and all ...
Nikita Kipriyanov's user avatar
2 votes
Accepted

Unable to SSH to GCP VM after reboot

The error "Permission denied (publickey)" can occur for several reasons. Follow below 2 workarounds, which may help to resolve your issue: It's impossible to fetch the actual password from a ...
Veera Nagireddy's user avatar
2 votes

In cloud, is it possible to access guest VM from host machine?

For the specifics of getting out of band access to your favorite rent-a-computer service, refer to their documentation. Usually called console access, serial console for the text version. Good ...
John Mahowald's user avatar
2 votes

SSH painfully slow on my local network?

Because this is pretty high in Google search results, here's my stab. I fixed sluggish ssh and high ping latencies on my local WiFi network by turning off WiFi Power Saver (on Linux) but might be ...
Mathieu Borderé's user avatar
2 votes

How to mount an old disk back to the RHEL VM without reboot?

Linux LVM VGs should be deactivated and exported prior to doing work on their member PV disks. Unmounting a file system is not sufficient, there's a layer in between these. For completeness, it is ...
John Mahowald's user avatar
2 votes

VMWare - Lower the size of a disk

It's not really a VMware specific thing but generally speaking unless you've consciously gone out of your way to do so then you'll fine shrinking disk volumes to be considerably more complex than you'...
Chopper3's user avatar
  • 102k
2 votes

Explaining why setting up a WiFi connection that interfaces with a virtual bridge in Linux is problematic

The problem is that a packet sent from the guest VM, that goes to the virtual bridge, then gets sent out by the WiFi NIC, and then reaches the access point on the router, has a source IP that is not ...
vidarlo's user avatar
  • 9,147
2 votes

How do I increase Threads per core for an Ubuntu VM in VMware?

You don't. ESXi passes the number of vCPUs forward and they are virtualized, while the host manages the cores and hyperthreading itself. The host will show all threads instead of simply physical cores....
zer0sig's user avatar
  • 21
1 vote
Accepted

VMWare Ubuntu - How to access a docker container in Ubuntu while also running nginx

Docker creates it own network and network adapter. When running the containers you can use the option network_mode host to be able to connect from the host operating system to the docker network where ...
Turdie's user avatar
  • 2,554
1 vote

What is the correct KVM VM vCPU config in cockpit for proper load balance on physical CPUs

The numbers of cores per socket you define for the VM should, in most cases, have no real reflection on how the VM workload is spread across the physical CPUs in the host: it’s mainly useful for ...
Mikael H's user avatar
  • 5,089
1 vote

Server 2022 Running Hyper-V Stuck in "Shutting down service: Hyper-V Virtual Machine Management" -Why?

You could try to run a PowerShell script before you restart which does a shutdown of the VMs. # Get all running virtual machines $runningVMs = Get-VM | Where-Object {$_.State -eq 'Running'} # Stop ...
Turdie's user avatar
  • 2,554
1 vote

Site down after VM restart

Is the VM's IP address ephemeral or reserved? The IP address in your screenshot 35.228.196.69 does not match the DNS resource record 34.88.197.250 for the domain portfoliodoc.app. Consult this guide, ...
John Hanley's user avatar
  • 4,924
1 vote
Accepted

How to remaster an Ubuntu Live ISO to revise grub.cfg to autoinstall from local cloud-init user-data

thank you for flying xorriso. :) /boot/grub/i386-pc/eltorito.img is for x86 legacy PC-BIOS. There is no use for it in an ISO for arm64. The same is true for the GRUB2 MBR. The EFI stuff is quite ...
Thomas Schmitt's user avatar
1 vote

Enable connection from Hyper-V guest to Windows Server 2022 host

When you setup your Virtual Switch, did you Select the "Private" Option? This may potentially explain why you cannot communicate with the VM from the Host Machine. If this is the case, you'...
Matti's user avatar
  • 23
1 vote

How to find the bottleneck of network bandwidth from local machine to Azure VM and improve it?

Welcome to the forum. The problem here is that you do not control the points between. Finding this granularity is part science, part art, as there is no real good one answer, more a report on findings ...
GeneMoody-Action1's user avatar
1 vote
Accepted

How to find the bottleneck of network bandwidth from local machine to Azure VM and improve it?

What about you do some utterly obvious tests - stuff that makes me wonder whether you should rather ask on superuser than on a site for professionals. Test the bandwidth on both endpoints and across. ...
TomTom's user avatar
  • 51.9k
1 vote

Disable TCP checksum offloading on KVM virtual network

I generally used this: <interface type='network'> <model type='virtio'/> <driver name='vhost'> <guest csum='off' tso4='off' tso6='off'/> </driver> <...
Florian Heigl's user avatar
1 vote
Accepted

How to automatically virtually boot partition windows 11 inside from windows server 2022 through VM or VMware or hyper-V?

Yes, this is possible with basically any hypervisor (virtualization software). Since you are running Windows Server already you could simply install the hyper-v role on that server and set up a new VM ...
MoWo's user avatar
  • 563
1 vote
Accepted

Sizing and moving /var/log to meet DISA STIG

The advisory says to use a separate partition for logs. In my experience, logs are a common source of denial of service when the root partition fills up. Assuming you are running VMs in the cloud, you ...
John Hanley's user avatar
  • 4,924
1 vote

Is it possible to mount an .iso file to the CD/DVD device of an VMware Workstation using command line?

Check if you can install inside the VM the PowerCLI's tool. In PowerShell with the VMWare PowerCLI could do the trick if so. Get-VM -Name VM_NAME | Get-CDDrive| Set-CDDrive -Connected $true -IsoPath '...
yagmoth555's user avatar
  • 17.1k
1 vote
Accepted

Internet-facing port 443 in Azure - security concerns

There's no yes or no answer to such questions. In short, you have to weigh risks and benefits. A WAF may make some attacks more difficult. Against other attacks it doesn't make any difference. It has ...
vidarlo's user avatar
  • 9,147
1 vote

What happens if the only DC fails?

It's standard practice since maybe Windows Server 2012 to have a) virtualized domain controllers (DCs), and b) have them configured in highly available (HA) mode. DCs have their own replication ...
BaronSamedi1958's user avatar

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