All Questions
Tagged with virtualization or virtual-machine
1,732 questions
3
votes
1
answer
144
views
How to fix a libvirt network setup error
I am creating a new QEMU/KVM virtual machine using libvirt CLI in Debian Linux.
According the tutorial, I must activate the default network using the following command:
sudo virsh net-start default
...
- 93
0
votes
0
answers
22
views
How to solve the prompt "internal error" when running a virtual machine on VMware Fusion on MacBook Pro?
error info:
Several virtual machines are installed in VMware Fusion, including Windows 10, CentOS, Ubuntu, etc., and all of them report this error when running.
Configuration details are as follows:
...
1
vote
1
answer
66
views
Preallocate large continuous memory block for legacy executable
I'm trying to develop J2ME game on Linux using this guide by microgram dev.
The j2me emulator from Oracle Wireless Toolkit works totally fine after Linux reboot.
I run some other apps like browser, ...
- 111
1
vote
1
answer
51
views
Space Issue on Elementary OS
I set up Elementary OS on a virtualbox VM for testing. When I did so I only selected 20 gb drive size. It didn't take long to fill that up because for some reason the LVM was set for ~16 gb. I resized ...
- 13
0
votes
0
answers
87
views
Enable DRI3 extension on Ubuntu VM with TigerVNC
I have downloaded the source code and built Chromium on an Ubuntu 24.04 VM (from https://chromium.googlesource.com/chromium/tools/depot_tools.git by following the instructions on https://chromium....
1
vote
1
answer
91
views
cloud-init tailscale setup fails due to missing /dev/net/tun
I want to provision a VM in proxmox with cloud-init, such that tailscale will be set up and running on first boot.
The image I use is alpine 3.22.1 (nocloud_alpine-3.22.1-x86_64-uefi-cloudinit-r0....
- 23
0
votes
0
answers
59
views
Why do NFS-backed files remain visible in a VM after host umount when shared via virtiofs?
I am curious about the behavior of Virtual Machine.
Environment
There are two computers.
192.168.180.10: NFS Server
Rocky Linux 9.6
192.168.160.30: VDSM Host (NFS Client)
Rocky Linux 9.6
VDSM ...
- 101
0
votes
0
answers
33
views
Is a raw file created by qemu-img the same as a -flat.vmdk file in VirtualBox?
I'm trying to serve an image using PXE and I just want to make sure that if I convert a .qcow2 file into a raw file, that's the same as creating a fixed-size -flat.vmdk file in VirtualBox, because ...
- 101
2
votes
1
answer
89
views
Is it possible to recover deleted files from a qcow2 disk in Proxmox using extundelete or ext4magic?
I’m running a Proxmox VM with a qcow2 disk (Ubuntu guest, ext4 filesystem). I tried to recover a recently deleted file using extundelete and ext4magic, but both tools failed to find the file, even ...
3
votes
1
answer
325
views
What's the difference between "QEMU/KVM" and "QEMU/KVM user session" in Virtual Machine Manager?
I just installed "Virtual Machine Manager" from Discover (flatpak) and I'm trying to learn how it works.
When I'm adding a connection, then it gives me two options: "QEMU/KVM" and &...
2
votes
3
answers
852
views
Virtual Machine Manager: Unable to connect to libvirt qemu:///system. Verify that an appropriate libvirt daemon is running
I just found an app on Discover Store (Flatpak) that is called "Virtual Machine Manager". So I've downloaded it, because I want to try and make a Windows 11 VM with it.
But as soon as I go ...
0
votes
0
answers
41
views
Cannot get display output back on vmware console after debian upgrade
I have a virtual machine with a GPU passed through via PCI for transcoding. No displays are connected to this GPU. I at one point had everything working and was able to access the desktop via the ...
- 111
2
votes
2
answers
850
views
KVM turning Linux kernel into a Type 1 Hypervisor
I’ve been reading about KVM, and I came across the statement:
“When the KVM module is loaded, the Linux kernel itself becomes a Type 1 hypervisor.”
I want to clarify if my understanding is correct ...
- 169
2
votes
1
answer
82
views
having trouble detecting user (qemu:///session) VMs from root account
I am trying to write a bash script that detects if there are any running VMs and performs a set of actions only when no VMs are running.
The system in question has several virtual machines (all from ...
- 1,113
0
votes
0
answers
193
views
Can't use distrobox due to permission error. Podman behaves weirdly
Prerequisites
Alpine Linux Edge
~ $ podman --version
podman version 5.5.2
~ $ distrobox --version
distrobox: 1.8.1.2
~ $ mount|grep ^cgroup|awk '{print $1}'|uniq
cgroup2
I followed the steps in ...
- 101