A virtual machine (VM) is a completely isolated guest operating system installation within a normal host operating system. It is a software implementation of a machine (i.e. a computer) that executes programs like a physical machine.

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Unable to ping between host machines and guest vms running on Vmware

In order to learn a bit about system administration, I've installed a Centos vm using Vmware on my local machine running Windows 7. Everything seems to be working fine since I can access the internet ...
3
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1answer
9k views

Why are virtual machines on vSphere 5.0 suddenly suspended?

We just got our vSphere 5.0 and vCenter Server 5.0 configuration working with several VMS. These are the vms. Jenkins appliance. vCenter Server Appliance Windows7x64 Windows7x64-1 Windows7x64-2 ...
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4answers
3k views

How to distribute a virtual machine to allow users to try out a dependency-heavy program?

I have written a piece of academic software that has many third-party software dependencies (and requires a RDBMS). I would like to create set up a Linux virtual machine image preloaded with all the ...
2
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3answers
226 views

Azure Ubuntu VM is completely unresponsive after security patches and restart

I have an Azure VM where I host a number of websites. Recently, I logged in and it needed some security updates so according to this link ...
2
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2answers
568 views

Can't use ctrl+c to kill process in VM

We are running several RHEL 6 64-bit VM's in a vBlock infrastructure using vCenter 5.5. If I open a console session through the vSphere web client the ctrl+c keystroke will not work. This is very ...
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3answers
2k views

Virtual Machines List from PowerShell vs PowerShell ISE and PowerGUI

I am confused to why I have different information based on where I try to retrieve it from. I have 3 Windows 2012 servers (G0, G1, and G2) running Hyper-V. The following situation is captured from one ...
2
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3answers
7k views

Can I add a second network adapter to my Azure VM?

I have Multiple VM's on Windows Azure. Default, they come with 1 network adapter and you can only assign 1 virtual network (Availability Set) My question is : possible to connect 1 VM to more then 1 ...
2
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1answer
3k views

VM Freezes at the end of a backup

I have a virtual machine that I'm backup up using Veeam Backup & Replication 6.5. The software is working well, but one issue I'm having is that at the end of the backup (99%) the machine will ...
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2answers
2k views

How to create new domain w/ Hyper-V 2012 hosting the DC server?

I have a small business client that's being spun off to run independently from a larger organization. They want to start from scratch and will be on their own premises. I'll be setting up a new 2012 ...
2
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2answers
988 views

Virtualizing Firewalls/UTM

So Sophos UTM (Astaro Gateway UTM) can be virtualized in Hyper-V, VMWare, vSphere etc. Now I'm new to virtualization, so am wondering how the networking would be configured in this situation. ...
2
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2answers
477 views

typeperf.exe Intermittently Returning -1

Edit: Sep. 26 2012 - I am updating this question and its tags because I have now encountered this error again, on a Server 2k8R2 VM. Still, there seems to be no authoritative information out there on ...
2
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2answers
353 views

Manage Hyper-V Server 2008 R2 from same machine

Is there a way to manage Windows Hyper-V Server 2008 R2 from within itself? E.g. not remotely. I'd like to be able to manage VMs as well as connect to and work with a a VM in full screen mode. This ...
2
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3answers
5k views

Windows 2003 activation nightmare, changed hardware

I backup some of my windows servers about 3 times a day because of the large amount of data that changes on it. I had a hardware failure that killed one of my machines, and now I have a problem. I ...
2
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2answers
3k views

Python simple http server and virtual machines - can't connect. Ip changed? [closed]

I sometimes use python -m SimpleHTTPServer one liner to serve files from my vms for download to my host. Today i tried to use it inside virtualbox vm that is under NAT network settings - i typed this ...
1
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1answer
72 views

Get-VMHost does not show the server Networkinfo and number of processes

I run the following powercli 5.5 command , to get info about a host vm :- Get-VMHost |Export-Csv -Path c:\VM.csv -NoTypeInformation –UseCulture and I got these info :- State ConnectionState ...
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1answer
995 views

Proxmox: 1 NIC, 1 Public IP, unable to get WAN interface working in VMs

I have a computer running Proxmox, and it has 1 single NIC that is directly connected to internet and has a single public IP. Then, I have different VMs (KVM) running and one of them is pfSense. What ...
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2answers
2k views

No Ping/Telnet connection between VM

I am new in Azure and have one problem which I can not solve. I tried asking on StackOverflow, but - quoting - "You will have better luck asking on ServerFault". I want several Virtual Machines to ...
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1answer
11k views

Why Are There Only 65,535 Ports, and Will We Ever Have More? [closed]

I understand the original reasoning behind having 65,535 ports per IP address: this is the highest number that can be represented by a 16-bit, or 2-byte, number, and it wasn't conceivable that ...
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1answer
2k views

Setting up mongodb via upstart - how to pass options?

I installed MongoDB in an Ubuntu Server VM inside VMware using these instructions: http://docs.mongodb.org/manual/tutorial/install-mongodb-on-ubuntu/. Everything works fine, and I can access MongoDB ...
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2answers
2k views

how to drop_caches in OpenVZ centos6 container

I have tried sudo sh -c 'echo 3 > /proc/sys/vm/drop_caches' sudo echo 3 > /proc/sys/vm/drop_caches echo 3 > /proc/sys/vm/drop_caches echo 3 | sudo tee /proc/sys/vm/drop_caches and a ...
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0answers
409 views

how to access virtual machine behind NAT from public network

I have a 1&1 hosting dedicated server (linux centos 5.x with plesk) (IP 74.208.98.x) and configured a nagiosxi virtual machine to run in NAT mode under VMware player 4.0. because i unable to use ...
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1answer
263 views

netkit: why cant my router 4 pc4 ping my router 1 pc1 - how can I solve this please?

Below I have four routers connected but my pc1 on r1 cannot ping my pc4 on r4 and also my pc2 on r2 cant ping my pc4 on r4 and vice versa. Below is a network diagram: and the configurations are below ...
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5answers
2k views

unable to rename linux hostname?

I got one problem with my linux webserver where I deployed from Virtual Machine template, usually i go to the console and then issue the command hostname NEWSERVERNAME to make it happens and then ...
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2answers
240 views

Is the # of CPUs on a virtual machine always meaningful?

On a virtual machine, if cat /proc/cpuinfo tells me that there are 4 CPUs, is this just as meaningful as if it were bare metal? Should I configure my server (for example, # of Nginx or Apache workers) ...
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2answers
311 views

Why is the total size of my files on Windows 7 more than total disk size?

I have a virtual machine with Windows 7 x64 quest OS. When I boot from PE OS CD and run file manager (Total Commander) I see that the total size of my files on virtual machine is more than total disk ...
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2answers
2k views

How to free up /var/lib/mysql (virtualbox vm)

I imported big dump into mysql and filled up my whole space (dumb me). Machine that's mysql server is virtualbox virtual machine. It's using automatically expanding virtual hard drive. I freed up few ...
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2answers
4k views

Xen - can't create domain because 'vdb could not be connected'

I'm trying to start up a Xen VM, however I'm getting the following error: Error: Device 2049 (vbd) could not be connected. Hotplug scripts not working. what does this mean? The dom0 is CentOS and ...
0
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2answers
82 views

Azure VM going cold when unused?

My virtual machines usually have nothing to do between 7pm until midnight when they reschedule a lot of work for the rest of the day. The scheduling starts with fetching a list of tasks and times from ...
0
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1answer
246 views

How to diagnostic internet access failure on a linux system?

I have a VM running on Xen. The virtual machine was running fine for months and suddently the network access broke down. Dom0 DomU .-------. bridge ...
0
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1answer
229 views

How to create a single image of Windows Server 2008 R2 to use on a Azure Virtual machine

I am trying to migrate from a colocation where I own the servers to Azure. I have been following this article: ...
0
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1answer
686 views

New Azure VMs on virtual network have no connectivity to anything

A couple of days ago, I created a cloud-only Azure virtual network (no cross-premises connectivity), provisioned a domain controller/DNS server inside of it, and configured both my DNS server and the ...
0
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1answer
140 views

i2b2 VM: Copy VM won't give me a valid IP address

After downloading a VM image and making a copy of it, I tried booting up both of them on the same Windows workstation using VMWare Player. I am unable to get an IP address for the second one in my ...
0
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2answers
553 views

reached the maximum partitions on my virtual machine

I have a virtual machine and I extended the size since I needed more space. Here is what I have and the message I am getting: I was reading up and I saw some references to diskpart.exe and it gave ...
0
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2answers
990 views

Why VM cannot get the public IP I have from provider?

I have a KVM-Host (on Debian) with root@kvm-host:/# cat /etc/network/interfaces auto eth0 iface eth0 inet manual auto vmbr0 iface vmbr0 inet static address 176.x.y.133 netmask 255.255.255.224 ...
0
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1answer
418 views

What are the differences in the configuration of the network on Proxmox (KVM)?

I have a dedicated server, one main public IP from /27 and two single public IPs also from the same /27 (I think the provider manages single IPs using the VLAN tags). I want to have a KVM running on ...
0
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1answer
698 views

How can I connect two virtual machines in vSphere ESXi 4.1?

There is documentation available for version 5 (I am running 4.1 per the title), but following the directions raises the error: Incompatible device backing specified for device '0'. upon ...
0
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3answers
1k views

VMWare ESX installation on sata disk

I have a PC with Gigabyte H77 motherboard with Intel I5-3550 CPU 8 GB RAM 1600MHz and a 500GB Harddisk (7200RPM) - WD Sata III disk I wish to install esx on it and run some virtual machines on it. ...
0
votes
1answer
738 views

Forward access to Apache on a virtual machine (vmware)

I have setup a server in a virtual machine using VMWare. The server is Apache running on Debian (the virtual machine). The host machine is Windows 7. Now, I would like everyone on the LAN to be able ...
0
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2answers
684 views

Which hardware to VM ratio for Build-Server virtualization?

After a few comments and answers and thinking, I hope I can now add a TL;DR : If I want full performance(a) and (simple) HW failure redundancy, does it make any sense to go for a virtualization ...
0
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1answer
288 views

Cannot delete unresponsive machine on VMWare Infrastructure Web Access on Windows 2003 host

I have some Windows virtual machines running on VMware on a Windows 2003 host, and I administer them via the Infrastructure web access. I recently added a CentOS Linux machine as well and it was ...
0
votes
1answer
360 views

netkit: Connecting 3 routers and trying to ping router 3 to router 1

hey guys, I am using Netkit to simulate a network, I am using the static routing lab provided by Netkit and I am trying to set up 3 routers. I have 3 routers each with a pc connected. pc1 on r1 can ...
0
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2answers
214 views

Prepare Windows OS image in virtual environment and deploy to real environment

I need to prepare some OS typical configurations for my office I wonder, if it is possible to configure Windows OS (likely 7) in virtual machine, then do a Sysprep, and then deploy it on physical ...
0
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5answers
507 views

Help Me Spec A Server for MAX VMs Reasonable Cost

I am planning on building servers to host the max number of VMs. Right now I have seperate machines running some applications, datamining type stuff and they each have about 1gig ram, 600-1GHz CPU and ...
0
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2answers
237 views

Why does my Fedora HD come up as 124GB when it was created to be 700GB in Hyper-V?

Any ideas? How can I tell fedora to use 700GB, and do I have reformat to do this? Filesystem Size Used Avail Use% Mounted on /dev/mapper/vg_computer-lv_root 124G ...
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1answer
61 views

When I have a Windows VM, how do I upload my website to it? [closed]

This is a really stupid question, I know, but I have literally zero experience on setting up a website/web app from the server level - I've always used a third party like Arvixe or GoDaddy. So, I ...
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1answer
124 views

Where can I learn fundamentals about hypervisors in context of other hardware virtualization solutions? [closed]

I am interested in learning more about hardware virtualization, with a specific focus on hypervisors. I am competent to manage a server and would be able to configure an environment to work using ...
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votes
1answer
70 views

Slow http response time from vm [closed]

I am currently hosting a test website under a 8 vcpu and 2gb ram virtual machine using nginx and php-fpm, the host machine is hosting other virtual machines doing the same thing with 10gbps network ...