Detect virtual machine linux

How to determine Linux guest VM virtualization technology

Determine Linux guest VM virtualization

As I said earlier, we need to use virt-what Linux command to find if the program is running in a virtual machine or not. It supports various hypervisors. Let us see how to install virt-what under differnet Linux distros.

Debian or Ubuntu Linux instllation

Run the apt command/apt-get command:
$ sudo apt-get install virt-what
OR
$ sudo apt install virt-what

Fig.01: Debian/Ubuntu Linux install virt-what command

Installing virt-what on RHEL/CentOS/Scientific Linux VM

Use the yum command:
$ sudo yum install virt-what

Fig.02: Fedora/RHEL/CentOS Linux install virt-what command

Fedora Linux VM install virt-what to detect if we are running in a virtual machine

Execute the dnf command:
$ sudo dnf install virt-what

Suse/OpenSUSE installation

Run the zypper command:
sudo zypper in virt-what

Check if your remote server runs in virtual environment

Simply type the following command:
$ $ sudo virt-what
xen
xen-domU
Another output:
$ $ sudo virt-what
kvm
Here is one more output:
$ $ sudo virt-what
lxc
This one is from AWS:
$ sudo virt-what
xen
xen-hvm
aws

Easy way to determine virtualization technology

Other possible values

1. hyperv : This is Microsoft Hyper-V hypervisor.
2. parallels : The guest is running inside Parallels Virtual Platform (Parallels Desktop, Parallels Server).
3. powervm_lx86 : The guest is running inside IBM PowerVM Lx86 Linux/x86 emulator.
4. qemu : This is QEMU hypervisor using software emulation.
5. virtualpc : The guest appears to be running on Microsoft VirtualPC.
6. xen-hvm : This is a Xen guest fully virtualized (HVM).
7. uml : This is a User-Mode Linux (UML) guest.
8. openvz : The guest appears to be running inside an OpenVZ or Virtuozzo container.
9. linux_vserver : This process is running in a Linux VServer container.
10. ibm_systemz : This is an IBM SystemZ (or other S/390) hardware partitioning system.

If nothing is printed, then it can mean *either* that the program is running on bare-metal *or* the program is running inside a type of virtual machine which we don’t know about or cannot detect. Here is the source code of the script:

Category	List of Unix and Linux commands
Documentation	help • mandb • man • pinfo
Disk space analyzers	df • duf • ncdu • pydf
File Management	cat • cp • less • mkdir • more • tree
Firewall	Alpine Awall • CentOS 8 • OpenSUSE • RHEL 8 • Ubuntu 16.04 • Ubuntu 18.04 • Ubuntu 20.04
Linux Desktop Apps	Skype • Spotify • VLC 3
Modern utilities	bat • exa
Network Utilities	NetHogs • dig • host • ip • nmap
OpenVPN	CentOS 7 • CentOS 8 • Debian 10 • Debian 8/9 • Ubuntu 18.04 • Ubuntu 20.04
Package Manager	apk • apt
Processes Management	bg • chroot • cron • disown • fg • glances • gtop • jobs • killall • kill • pidof • pstree • pwdx • time • vtop
Searching	ag • grep • whereis • which
Shell builtins	compgen • echo • printf
Text processing	cut • rev
User Information	groups • id • lastcomm • last • lid/libuser-lid • logname • members • users • whoami • who • w
WireGuard VPN	Alpine • CentOS 8 • Debian 10 • Firewall • Ubuntu 20.04

Comments on this entry are closed.

systemd (I’ve read that centos7 has systemd) has the same functionality “#systemd-detect-virt “.

You have missed to comment one of the main players in the game: “VMware”. I was looking for the detection of VMware but you did not comment on it on the article. I had to read the script to realize it is detected as well.

By the way, nice post. and absolutely fantastic blog.

Thanks for the kind words. Yes, it detects vmware too.

Good write up, I typically just do: “parted /dev/sda print” and I can tell by the virtual disk name what it is.

It’s appeared on my EL5 and EL6 systems for the past few years as part of default installations. Ubuntu has it, and the source is available as well. In “recent” linux kernels, the kernel detects the hypervisor for you and prints a message that is easily available with

It might be possible for your code to see what sort of virtualisation it could set up. If that fails entirely, you might be in a VM. But you just as might easily be on a box that doesn’t have any VM capable hardware.

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Русские Блоги

Проверьте, какая технология виртуализации используется гостевой виртуальной машиной Linux

Слова, написанные спереди

Если у меня есть виртуальная машина на основе облака и серверная система Linux под управлением Ubuntu или CentOS, и эти устройства могут быть виртуализированы, а могут и нет, как мы должны судить об использовании этого устройства гостевой системы Linux? Какая это технология виртуализации (VMWARE / KVM / XEN / VirtualBox / Container / lxc / Hyper-V и т. Д.)? Итак, как мы можем определить тип технологии виртуализации, используемой CentOS 7 Linux VPS?

технический анализ

Нам нужно использовать программу virt-what (сценарий оболочки) для определения типа технологии виртуализации, используемой системой целевого устройства. Она может распечатать любую информацию о технологии виртуализации целевого устройства. В этой статье мы расскажем, как определить тип технологии виртуализации гостевых виртуальных машин Linux.

Определить тип технологии виртуализации гостевых виртуальных машин Linux

Как мы только что сказали, нам нужно использовать команду virt-what Linux, чтобы определить, запущена ли программа в настоящий момент на устройстве виртуальной машины. Скрипт поддерживает различные гипервизоры.Далее давайте посмотрим, как установить virt-what в разных системах дистрибутива Linux.

Установка Debian или Ubuntu Linux

Сначала запустите следующую команду apt / apt-get:

Установите virt-what в виртуальную машину RHEL / CentOS / Scientific Linux

Мы можем использовать команду yum для завершения установки:

Fedora Linux VM устанавливает virt-what, чтобы определить, является ли текущая среда средой виртуальной машины.

Выполните команду dnf:

Установка Suse / OpenSUSE

Запустите команду zypper:

Определите, является ли удаленный сервер средой виртуальной машины

Мы можем напрямую вводить и запускать следующие команды:

Другие выходные результаты:

Ниже приводится результат, возвращаемый AWS:

Другие возможные значения

1. Hyperv: это программа управления Microsoft Hyper-V;

2. Parallels: гостевые пользователи работают на виртуальных платформах Parallels (Parallels Desktop, Parallels Server);

3. powervm_lx86: пользователь-гость работает в симуляторе IBM powervm lx86 Linux / x86;

4. qemu: это программа управления QEMU, использующая технологию программного моделирования;

5. Virtualpc: гостевой пользователь работает на Microsoft VirualPC;

6. xen-hvm: это полностью виртуализированная платформа Xen Guest (HVM);

7. UML: это клиент Linux (UML) в пользовательском режиме;

8. openvz: гостевой пользователь работает в контейнере OpenVZ или Virtuozzo;

9. linux_vserver: этот процесс выполняется в контейнере Linux VServer;

10. ibm_systemz: это система аппаратных разделов IBM SystemZ;

Если выходной результат отсутствует, это означает, что наша программа может быть запущена на «голом железе» или программа может работать в системе виртуальной машины, которую мы не можем обнаружить.

Исходный код скрипта обнаружения

Ниже приводится исходный код скрипта:

Как использовать команду dmidecode для поиска той же информации

Сотрудничайте с циклом Bash for и используйте команду dmidecode для определения целевой технологии виртуализации:

Другие команды, используемые для определения технологии виртуализации

Мы также можем использовать команду systemd-detect-virt для обнаружения виртуализированной среды:

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How to Check if Linux Server is Physical or Virtual

Most of the IT sector has migrated to the virtual environment (not just IT and many tech companies) to reduce infrastructure costs.

But they still have physical servers for some specific purpose.

In recent days we have received some mail requests regarding this topic.

We don’t have a proper test environment to work with, but we now have a small test environment with VMware and VirtualBox.

So today we had the opportunity to write an article to verify whether the machine is physical or virtual.

As a Linux server administrator, you need to know whether the machine is physical or virtual in your environment. This can be very helpful if you want to fix anything on the system.

Popular Virtualization Technology KVM, OpenVZ, Xen and MWare, VirtualBox are popular virtualization software.

There are many ways to identify the state of the machine (physical or virtual) in Linux. Here, we have listed ten simple methods to determine it.

Method-1: How to Check Whether the Linux Server is Physical or Virtual Using the dmidecode Command

The dmidecode command reads the system DMI (Desktop Management Interface) table to display about your system’s hardware and BIOS information. The table has system manufacturer, model name, serial number, BIOS version, CPU sockets, expansion slots, memory module slots, and the list of I/O ports, etc.

The above output clearly shows the appropriate virtualization name. It displays the manufacturer name if it’s a physical server.

Method-2: How to Check if Linux Server is Physical or Virtual Using the lshw Command

The lshw command (Hardware Lister) is a small tool to provide detailed information on the hardware configuration of the machine. It can report exact memory configuration, firmware version, mainboard configuration, CPU version and speed, cache configuration, bus speed, etc. on DMI-capable x86 or EFI (IA-64) systems and on some PowerPC machines (​PowerMac G4 is known to work).

For VMware system

For VirtualBox system

lshw Command Output in Physical Server

Method-3: How to Check Whether the Linux Server is Physical or Virtual Using the facter Command

Facter is a standalone tool based on Ruby that provides system information.

Method-4: How to Check if Linux Server is Physical or Virtual Using the imvirt Command

imvirt is a set of Perl modules which used to detect whether the Linux box is physical or virtual. If it detects that it is a virtualized one, then it tries to find out which virtualization technology is used.

Method-5: How to Check Whether the Linux Server is Physical or Virtual Using the virt-what Command

virt-what is a small shell script which can be used to detect if the Linux box is running in a virtual machine. Also its print the virtualization technology is used. If nothing is printed and the script exits with code 0 (no error), then it physical server.

Method-6: How to Check if Linux Server is Physical or Virtual Using the systemd-detect-virt Command

systemd-detect-virt detects execution in a virtualized environment. It identifies the virtualization technology and can distinguish full machine virtualization from container virtualization.

Method-7: How to Check Whether the Linux Server is Physical or Virtual Using the hostnamectl Command

The hostnamectl tool is provided to administrate the system hostname. There are three separate classes of host names in use on a given system, static, pretty, and transient.

VirtualBox Output

Physical Output

Method-8: How to Check if Linux Server is Physical or Virtual Using the hwinfo Command

The hwinfo command is used to probe for the hardware present in the system. It can be used to generate a system overview log which can be later used for support.

Method-9: How to Check Whether the Linux Server is Physical or Virtual Using the lscpu Command

lscpu – display information on CPU architecture and gathers CPU architecture information like number of CPUs, threads, cores, sockets, NUMA nodes, information about CPU caches, CPU family, model and prints it in a human-readable format.

Note: The hypervisor option will not be listed if it’s a physical server.

Method-10: How to Check if Linux Server is Physical or Virtual Using the inxi Command

The inxi command is a script that quickly shows system hardware, CPU, drivers, Xorg, Desktop, Kernel, GCC version(s), Processes, RAM usage, and a wide variety of other useful information, also used for forum technical support & debugging tool.

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