Especially important: how fast does existing x86 software (as virtualmachine or docker container) can be run on very energy efficient ARM SoC? Apple already demostrated that with their M1/M2 (soon M3?) ARM based chip designs (congratz!) it is possible to […]
In search for alternatives, decided to test drive “gnome boxes“, which is said, to be an easy-going gui for the libvirt qemu virtualization system. lsb_release -d; # tested on Description: Debian GNU/Linux 11 (bullseye) su – root apt update # […]
virt-manager Links: run search: https://dwaves.de/?s=kvm GNU Linux Debian 10/11/Ubuntu – how to install kvm virtualization (qemu) – basic virsh commands – kvm cheat sheed – howto workaround virt-manager “emulator may not have search permissions for the path”
make sure guest additions are installed (on the guest vm) it is a simple matter of the user not being in group “vboxsf” and thus denied usage of vbox filesystem service (fs) lsb_release -a; # tested on guest Description: Debian […]
not employed by Oracle in any kind, the only advantage VirtualBox (still) has over all the other virtualization systems: was designed to be cross OS from the start and does that pretty well. Holy Crap! Google (crazy guys) ported KVM […]
# if the user wants to be converted from VirtualBox to kvm # 1. first clone the VirtualBox vm into a new vm (to consolidate all snapshots into one vdi # 2. convert file format qemu-img convert -f vdi -O […]
lsb_release -a; # tested with Distributor ID: Debian Description: Debian GNU/Linux 11 (bullseye) Release: 11 Codename: bullseye su – root wget https://download.virtualbox.org/virtualbox/6.1.32/virtualbox-6.1_6.1.32-149290~Debian~bullseye_amd64.deb sha512sum 7e977fde8a2fc370d7df24f761e75eced308ea17037113db877bd799abec4a3a9b6324fcbfda2d2a67d63fbe23b822abbd36ab0f9af4fc5c352df04a97dbe550 # needs to be dpkg installed manually # install requirements apt update && apt upgrade apt […]
with virt-manager, it is a breeze to select the PCI device (in this case enp3s0 NIC) for pass through to guest vm, in case the vm shall get it’s very own dedicated nic: notice: the passed NIC dissapears from the […]
it is actually like this, in virt-manager, that chipset and bios can only be changed during first setup “begin installation” it then is fixed and can not be changed in virt-manager
let’s say: in theory – it works in reality – there are (currently) massive sata harddisk driver problems between esxi 6.7 and kvm-qemu’s virtual harddisk admin-user know: esxi is hardware picky (Dell bought VMWare in 2004 so, “officially” only Dell […]
a bit of a warning: this script is a bit of hardcore kvm “hacking” that might (sometimes) not work (kvm is under heavy development), wish to kvm and virsh-manager developers: please please integrate an easy way (like in virtualbox) for […]
hostnamectl; # tested on Static hostname: lenovo Operating System: Debian GNU/Linux 10 (buster) Kernel: Linux 4.19.0-17-amd64 Architecture: x86-64 # with virsh –version 5.0.0 libvirtd –version libvirtd (libvirt) 5.0.0 /usr/bin/kvm –version QEMU emulator version 3.1.0 (Debian 1:3.1+dfsg-8+deb10u8) Copyright (c) 2003-2018 Fabrice […]
tested on host # debian 10 this option is only available in the gui on newer versions of virsh-manager to create a thin provisioned harddisk of capacity of 32GB image via bash-terminal go: qemu-img create -f qcow2 name-of-harddisk-image.qcow2 32G as […]
the error message basically means: the VM’s screen can not be auto-resized because the VBoxGuestAdditions kernel module drivers software was not properly build & installed. the solution: rebuild & reinstall the VBoxGuestAdditions (kernel module) properly: hostnamectl; # tested on guest […]
so RedHat developed the virsh manager, but not qemu itself. https://stackoverflow.com/questions/43704856/what-are-the-differences-between-qemu-and-virtualbox QEMU is a generic and open source machine emulator and virtualizer. When used as a machine emulator, QEMU can run OSes and programs made for one machine (e.g. an […]
hostnamectl; # tested on Static hostname: hpServerG6 Operating System: Debian GNU/Linux 10 (buster) Kernel: Linux 4.19.0-12-amd64 Architecture: x86-64 su – root; apt update; apt install qemu-kvm libvirt-clients libvirt-daemon-system bridge-utils virtinst libvirt-daemon virt-manager usermod -a -G libvirt user; # give user […]
btw: love kvm (used by very large companies) just as virtualbox (oracle) the task: over the years a windows vm is using up massive amounts of precious server harddisk space (snapshots before everyupdate) all the snapshots now add up to […]
update 2022: next to the good old (non-destructive if used correctly) “dd” is still the way to go for benchmarking harddisks under GNU Linux. a simpler one is “gnome-disk-utility” also interesting but not very simple in installation & usage (complicated! […]
i really like virtualbox and i think it has great potential, what i do not like SOOO much is the CIA’s involvement with Oracle. “Larry Ellison Is A Billionaire Today Thanks To The CIA” (src) VirtualBox is mostly GPL 2.0 […]
in addition to select “IDE emulate” in VM Settings one should also restart 1) client 2) server 3) vm
sometimes one wants to restart a windows vm every x days – to clean up RAM and Co. run task scheduler “Aufgabenplanung” %windir%\system32\taskschd.msc /s File/Datei -> New/Neu -> Basic Task/Einfache Aufgabe select or copy paste: %SystemRoot%\System32\shutdown.exe one has to scroll […]
running esxi inside virtualbox vm is just a test, to play with it, unfortunately one will not be able to start vms on it, because of the lack of nested virtualization. (could/should work nested inside quemu-kvm?) the problem: should have […]
Update: kvm is also a good alternative, but only on linux hosts, so if the user plans to move vms between linux and windows hosts, virtualbox is the way to go. Update: 2020-02: VirtualBox 6.1 is available in repository “Debian […]
# setup log of VirtualBox Graphical User Interface Version 6.0.10 r132072 (Qt5.7.1) # on Debian 9.8 with Cinnamon Desktop # go into software repo user@debian98:~$ cd /software/ # download latest version of software user@debian98:/software$ wget https://download.virtualbox.org/virtualbox/6.0.10/virtualbox-6.0_6.0.10-132072~Debian~stretch_amd64.deb –2019-08-03 14:36:05– https://download.virtualbox.org/virtualbox/6.0.10/virtualbox-6.0_6.0.10-132072~Debian~stretch_amd64.deb Resolving […]
usually host-shared-folder get auto-mounted during boot via vboxsf kernel module. symptoms: # manually mounting the by-host-shared-folder “projects” # as user with uid 1000 and groupid 1000, results in: mount -t vboxsf -o uid=1000,gid=1000 projects /media/sf_projects # also try: mount -t […]
Short stoy: AltGr (HostKey) + C will quit “seamless (no menues) mode” really like the cross-os capabilties of virtualbox (possible to move vms between GNU Linux and Windows servers) and think it has great potential, what is not so great […]
this is a very very basic sequential harddisk write test performed on host and guest. there are multiple ways, how you could improve the performance: Use fixed size disks Allocate RAM and CPUs wisely Install the Guest Additions enable host […]
first of all: i (still) love VirtualBox. The ability to migrate VMs between Windows and Linux servers is really cool, and it is still free to use. NO other Virtualization software can do that! 🙂 and that is exactly my […]
lately on WCG: Avoid CO2 use the Fusion Reactor in the Sky (if the 2 is pronanced German than it even rhymes) as a lot of fossil fuel is (still in 2021!) used to produce electrictiy, it is possible and […]
basically everything that you can do with the super conveniant virtualbox gui you can do from the commandline on a headless server. # set default vm directory # where all vms should reside in # also if you clone a […]