A virtual machine (VM) is a guest Operating System running in a completely isolated environment within a normal host operating system. Modern virtual machines are implemented with either software emulation or hardware virtualization or (in most cases) both together.
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Lightweight isolated linux environment
I want an isolated (guest) Linux environment on my computer that I can mess up without worrying about the host. E.g. install a lot of stuff from source without package management, pollute environment ...
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1answer
78 views
Fedora 18 Live CD is hanging on boot
When I boot up Fedora 18 (Fedora-18-x86_64-Live-Desktop.iso) in a Virtual Machine, I just get this screen:
I've verified the SHA sum, and I've tried starting it up in "basic graphics mode", yet I ...
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3answers
55 views
Linux / JVM - OutOfMemoryError: unable to create new native thread
I have a memory problem with a Linux server (CentOS). It is a VM. Below is the context.
It has 70Gb of RAM. There are 2 tomcat running on it.
One tomcat is given a heap of 13Gb and the other one a ...
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1answer
42 views
NFS server on qemu guest
I need to know how I can mount block devices, placed on a qemu guest system, from host. So in this case we have NFS server placed on guest system and NFS client on the host's side.
There are a lot ...
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2answers
207 views
Linux guest VM on mac host - Keyboard
I use a Mac as a development box, but am slowly transitioning to Linux. So I am spending the majority of my time in the Linux guest VM while working. But I still spend a fair amount of time in Mac ...
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2answers
98 views
Install Arch Linux to external hard disk using a Virtual Machine?
I have an external hard disk and I want to install Arch Linux on it. Since I'm a complete beginner I want to have access to the online the documentation. As the title states, it is possible to install ...
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6answers
798 views
Find out if the OS is running in a virtual environment
Is there any way to find out if the OS i'm running (actually installing) is running in a VMWare machine. I need to disable ntp settings if the automated install is done on a virtual machine but keep ...
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2answers
153 views
Strange encoding in Slackware
I am a student and learning about operating systems, I was modifying a file using vi, when I accidentally did something (I don't remember what) that change the codification/encoding and now this is ...
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3answers
95 views
Can I install ubuntu on a Virtualbox image and use it anywhere?
I am wondering if I install ubuntu once on a virtual machine running inside virtualbox, could I then use it as a portable OS and launch it from virtualbox on any machine? Or would I have to match the ...
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2answers
6k views
File permission issues with shared folders under Virtual Box (Ubuntu Guest, Windows Host)
I am using Ubuntu on Virtual Box and I have a folder which is shared between the host (Windows) and the VM (Ubuntu). When I open any file in the share folder in Ubuntu, I can not change it as its ...
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2answers
182 views
What is the best way to do GUI development on a server machine?
This is a server at home. I have 3 computers running Linux and they are all servers running dedicated tasks like MySQL/Samba, Web Server and DNS/DHCP.
Is it be a good idea to host a virtual machine ...
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4answers
2k views
Convert image of a partition into image of a disk with partition table
I have an image of an existing partition generated with dd if=/dev/sdXN of=image.bin. Now I want to use this image as the basis for a virtual machine. I know how to convert the image into a format ...
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How do I setup DNS names and static IPs for an Ubuntu virtualbox? [migrated]
I have Ubuntu installed on VirtualBox, on top of a Windows 8 host. How can I setup a static IP and DNS name for this virtual machine that other virtual machines will see?
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Any reason NOT to run Linux in a VM all the time?
I've switched to using Arch Linux for most of my day to day work and don't need Windows for anything but gaming and the couple of apps that aren't ported to Linux like OneNote. My Linux distro is ...
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2answers
6k views
How do I run 32-bit programs on a 64-bit Ubuntu?
I have a 64-bit (amd64 a.k.a. x86_64) Debian or Ubuntu installation. I need to run 32-bit (i386/i686) programs occasionally, or to compile programs for a 32-bit system. How can I do this with a ...
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2answers
482 views
Attach terminal to X desktop running in VM
At home I'm setting up a CentOS 5.5 server that will be running a bunch of KVM VMs. Normally pressing the CTRL-SHIFT-Fn combination on the attached keyboard switches to terminals on the host machine. ...
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1answer
242 views
What File Transferring Method (i.e. FTP) Can I Use for rlogin (Solaris 8 on SPARC)
For all my other Unix Virtual Machines, I use SSH and I use WinSCP to transfer files from my Windows Vista machine to the VM's.
Now, One of the VM's is using rlogin, What can I use to transfer files ...
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2answers
56 views
Create a CentOS Guest img over Ubuntu
I want to create a basic CentOS 5.8 system from scratch.
for now i build my own img for Ubuntu Guest (debootstrap), my host is a Ubuntu 12.04.1LTS but I don't know how to make for a CentOS, is ...
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2answers
71 views
Do I need acpid in a virtual machine?
I'm always wondering if power management facilities in a virtual machine is necessary?
i.e acpid.
And I'm not sure if they still function in a virtual machine.
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1answer
2k views
Slow response time with Gnome shell in Virtualbox fullscreen mode
Today I installed Fedora 15 in a VBox VM to try out Gnome 3. After installing the guest extensions almost everything works fine. Except for the slow response time in fullscreen mode (HOST+F).
By that ...
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0answers
18 views
Can I run hostapd in a virtual machine hosted in a windows system?
I would like to know if it is possible to run any linux/unix distribution with hostapd in a virtualized environment.
My idea is to host a small virtual machine, which will use my Windows Host ...
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2answers
59 views
Can I have a bridged interface without an IP?
I have 2 NICs: eth0 & eth1 on a host OS which runs some VMs (LXC) under it.
The hosts eth0 is connected to a private network and configured as the primary interface.
The hosts eth1 is connected ...
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1answer
120 views
How to get past “Loading Initial Ramdisk” hang after going from x86_64 to i686 cpu
Long story short, I have a Ubuntu 12.04 64-Bit Server setup as a virtual machine with VirtualBox (4.1.18). I migrated the guest machine from an AMD chipset (a gaming machine) to an Intel Xeon (server ...
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2answers
71 views
Install the same 64-bit packages as a 32-bit Xubuntu installation
I have been using a virtual machine (Xubuntu 12.10, with VMWare on a windows host) for all my programming work, which I am trying to transition from a 32-bit install to a 64-bit install. I am hoping ...
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Network in LXC not forwading through a bridge
I've got an LXC container, on the host I've got a bridge between the LXC container and eth0.
The LXC container can ping it's Host 10.1.0.5, but can't ping the gateway of 10.1.0.2. The host is able to ...
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1answer
674 views
Can I get full video capabilities in Arch Linux guest on Virtual Box?
I'm trying out arch linux on my win7 host on a VB and I have it installed just fine, the problem is that when I try to use gnome-shell it goes back to fallback mode because it detects that my video ...
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76 views
Unable to install Parallels Workstation Extreme 6 on Linux Mint 14 KDE
I just installed Linuxmint 14 KDE 64bit on my pc, and tried to install Parallels Workstation Extreme 6, but for some reason it showed errors and wasnt working.
I did some googling and found someone ...
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1answer
188 views
Everything works except Fedora
I'm taking an Operating Systems class online for college. It requires us to have a copy of Fedora 13, provided by our instructor, running on a virtual machine. On my machine, it boots to a message ...
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166 views
Sending Emails from bash script in Solaris VM
I am trying to send emails using the following bash script:
/bin/mail -s "#subject" "$emailto" < "$message"
It works fine on my local machine but does not work on my VM.
I looked it up and read ...
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1answer
132 views
how to send CTRL-ALT-Fn to virtual box guest Linux?
This should be a simple question:
Host OS: Arch Linux
Guest OS: Arch Linux (GNOME)
How can I send Ctrl+Alt+F1 to my Guest Linux OS?
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454 views
Why does dhclient fail with my ISP's DHCP server on a virtual interface?
Recently I switched from a T1 to a residential cable service (Comcast). I have a virtual machine (XenServer 5.6) running Debian 6.0.6 that is acting as the default gateway for my home network, but for ...
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1answer
803 views
Guide to installing Xen on CentOS 5.9 (That is still valid)
I need an idiots guide to installing Xen Hypervisor on CentOS 5.9
We attempted to install it on 6.3 before, but completely failed, so we reverted to 5.9 to see if we had more luck. We had issues ...
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1answer
68 views
How to use a backup in OpenVZ
I have a backup (.tgz file) that is an openvz virtual machine. i followed this article and i setup an openvz container but how i will use my backup file?
EDIT:
i found the tool ovz-web-panel (i am ...
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3answers
1k views
How secure is Ubuntu in Virtualbox on Windows host?
I have the most recent version of Ubuntu in Virtualbox on Windows 7 host. How secure will that be? I mean if I get malware on windows how will that affect the Ubuntu system I am working on?
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Problem getting Fedora to run in VirtualBox
I'm using Ubuntu 12.04 64-bit, trying to get Fedora 18 64-bit to run in the Oracle VM VirtualBox.
I've got VirtualBox installed (via the .deb package available from the official site,) and I got the ...
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1answer
96 views
How to enlarge existing file to specific size
I have hdd.img file, which I user as HDD for my virtual machine, but it's size is too small, how can I enlarge it?
There is one method, something like:
dd if=/dev/zero ds=10GB count=8 >> ...
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1answer
328 views
“client denied by server configuration” with “AllowOverride All”
I've installed CentOS 6.3 with Apache 2.2 on a VM. I'm trying to set up a LAMP stack with these VirtualHosts:
localhost loads the path /var/www/html/
lcl.mydomain.com loads the path ...
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votes
2answers
137 views
disabling ssh session expiration
I am installed Ubuntu on Virtual Box, and use xshell (a remote terminal application) to ssh to ubuntu. when I hibernate computer during night, after powering it on, the session is expired and I should ...
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367 views
Setting up SMTP-AUTH & TLS in Postfix
So I have been in the process of installing a Postfix Server on my CentOS 6.2 Virtual Private Server.
I have been following this tutorial:
...
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4answers
1k views
Good distro for a VM?
I want a lightweight Linux VM that I can run with VirtualBox on Windows so I can test how to deploy PHP apps, Mono apps, etc. I don't need the UI and was thinking of going with the Ubuntu server ISO. ...
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votes
2answers
2k views
Unable to boot VM: Error 13: Invalid or Unsupported Executable Format
I used VMWare vConverter and everything converted fine, but when I try to boot I get an error:
The physical machine boots correctly, so I don't think it is a source machine issue. I am not sure why ...
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3answers
423 views
How to access a KVM virtual-machine?
I've created a KVM VM using virt-install. There is an image file in the directory /ssd/kvms.
How do I access the virtual machine and turn it on? Do I need to assign an IP address, and if so, how do I ...
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4answers
4k views
Booting the already installed Windows from the VirtualBox installed in Ubuntu
I want to boot the Windows which is installed in laptop's internal harddisk(/dev/sda1) from the VirtualBox installed in my Ubuntu. Can somebody tell me how to do this in VirtualBox.
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1answer
202 views
How to install FTP server on Red Hat VM?
I have a windows machine and I need to transfer files from my machine to another Linux virtual machine which I have created.
How do I install a FTP server on those VM's to transfer files via FTP ...
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3answers
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VirtualBox: two network interfaces (NAT and host-only ones) ina a Debian guest on Ubuntu
I created a Debian VM on VirtualBox with two interfaces: a NAT one (for accessing internet) and a host-only one. However, I do not know how to make both interfaces work at the same time. If I the ...
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PCI passthrough with Xen
I am trying to run Windows XP in a Xen DomU virtual machine with a PCIe device, for which there are no Linux drivers, being passed through from a Debian Squeeze Dom0. My hardware supports ...
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1answer
554 views
VBoxManage: Error: Can't be used as the requested device
I used the soluton from this thread but always i get
VirtualBox error: The medium 'lvol.vmdk' can't be used as the requested device type (0x80004005)
I've tried all controllers SATA, SCSI, IDE and ...
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0answers
143 views
not all initrd.img's are born equal?
I am trying to get a Red Hat 5.8 box booting via pxe. The box is a virtual machine on ESX5.0 it has a Paravirtual SCSI Controller and VMXNET3 network driver. Now these drivers do not come default in ...
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1answer
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What is the difference between virbr# and vnet#?
I am running KVM on RHEL6, and I have created several virtual machines in it. Issuing ifconfig command to the host system command line shows a list of virbr0, virbr1... and vnet0, vnet2... Are they ...
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1answer
130 views
How to get the cloned guest connected to the Internet?
I made a clone of a VM(running a version of Centos 6) on KVM, but the clone wouldn't connect to the Internet. Issuing ifconfig shows no interfaces but the lo. Interestingly, the original system can ...
