Provided by: systemd_256.4-2ubuntu1_amd64 bug

NAME

       systemd-detect-virt - Detect execution in a virtualized environment

SYNOPSIS

       systemd-detect-virt [OPTIONS...]

DESCRIPTION

       systemd-detect-virt detects execution in a virtualized environment. It identifies the
       virtualization technology and can distinguish full machine virtualization from container
       virtualization.  systemd-detect-virt exits with a return value of 0 (success) if a
       virtualization technology is detected, and non-zero (error) otherwise. By default, any
       type of virtualization is detected, and the options --container and --vm can be used to
       limit what types of virtualization are detected.

       When executed without --quiet will print a short identifier for the detected
       virtualization technology. The following technologies are currently identified:

       Table 1. Known virtualization technologies (both VM, i.e. full hardware virtualization,
       and container, i.e. shared kernel virtualization)
       ┌──────────┬──────────────────────────┬──────────────────────────┐
       │TypeIDProduct                  │
       ├──────────┼──────────────────────────┼──────────────────────────┤
       │VM        │ qemu                     │ QEMU software            │
       │          │                          │ virtualization, without  │
       │          │                          │ KVM                      │
       │          ├──────────────────────────┼──────────────────────────┤
       │          │ kvm                      │ Linux KVM kernel virtual │
       │          │                          │ machine, in combination  │
       │          │                          │ with QEMU. Not used for  │
       │          │                          │ other virtualizers using │
       │          │                          │ the KVM interfaces, such │
       │          │                          │ as Oracle VirtualBox or  │
       │          │                          │ Amazon EC2 Nitro, see    │
       │          │                          │ below.                   │
       │          ├──────────────────────────┼──────────────────────────┤
       │          │ amazon                   │ Amazon EC2 Nitro using   │
       │          │                          │ Linux KVM                │
       │          ├──────────────────────────┼──────────────────────────┤
       │          │ zvm                      │ s390 z/VM                │
       │          ├──────────────────────────┼──────────────────────────┤
       │          │ vmware                   │ VMware Workstation or    │
       │          │                          │ Server, and related      │
       │          │                          │ products                 │
       │          ├──────────────────────────┼──────────────────────────┤
       │          │ microsoft                │ Hyper-V, also known as   │
       │          │                          │ Viridian or Windows      │
       │          │                          │ Server Virtualization    │
       │          ├──────────────────────────┼──────────────────────────┤
       │          │ oracle                   │ Oracle VM VirtualBox     │
       │          │                          │ (historically marketed   │
       │          │                          │ by innotek and Sun       │
       │          │                          │ Microsystems), for       │
       │          │                          │ legacy and KVM           │
       │          │                          │ hypervisor               │
       │          ├──────────────────────────┼──────────────────────────┤
       │          │ powervm                  │ IBM PowerVM hypervisor — │
       │          │                          │ comes as firmware with   │
       │          │                          │ some IBM POWER servers   │
       │          ├──────────────────────────┼──────────────────────────┤
       │          │ xen                      │ Xen hypervisor (only     │
       │          │                          │ domU, not dom0)          │
       │          ├──────────────────────────┼──────────────────────────┤
       │          │ bochs                    │ Bochs Emulator           │
       │          ├──────────────────────────┼──────────────────────────┤
       │          │ uml                      │ User-mode Linux          │
       │          ├──────────────────────────┼──────────────────────────┤
       │          │ parallels                │ Parallels Desktop,       │
       │          │                          │ Parallels Server         │
       │          ├──────────────────────────┼──────────────────────────┤
       │          │ bhyve                    │ bhyve, FreeBSD           │
       │          │                          │ hypervisor               │
       │          ├──────────────────────────┼──────────────────────────┤
       │          │ qnx                      │ QNX hypervisor           │
       │          ├──────────────────────────┼──────────────────────────┤
       │          │ acrnACRN hypervisor[1]       │
       │          ├──────────────────────────┼──────────────────────────┤
       │          │ appleApple virtualization     │
       │          │                          │ framework[2]             │
       │          ├──────────────────────────┼──────────────────────────┤
       │          │ sreLMHS SRE hypervisor[3]   │
       ├──────────┼──────────────────────────┼──────────────────────────┤
       │googleGoogle Compute Engine[4] │                          │
       ├──────────┼──────────────────────────┼──────────────────────────┤
       │Container │ openvz                   │ OpenVZ/Virtuozzo         │
       │          ├──────────────────────────┼──────────────────────────┤
       │          │ lxc                      │ Linux container          │
       │          │                          │ implementation by LXC    │
       │          ├──────────────────────────┼──────────────────────────┤
       │          │ lxc-libvirt              │ Linux container          │
       │          │                          │ implementation by        │
       │          │                          │ libvirt                  │
       │          ├──────────────────────────┼──────────────────────────┤
       │          │ systemd-nspawn           │ systemd's minimal        │
       │          │                          │ container                │
       │          │                          │ implementation, see      │
       │          │                          │ systemd-nspawn(1)        │
       │          ├──────────────────────────┼──────────────────────────┤
       │          │ docker                   │ Docker container manager │
       │          ├──────────────────────────┼──────────────────────────┤
       │          │ podmanPodman[5] container      │
       │          │                          │ manager                  │
       │          ├──────────────────────────┼──────────────────────────┤
       │          │ rkt                      │ rkt app container        │
       │          │                          │ runtime                  │
       │          ├──────────────────────────┼──────────────────────────┤
       │          │ wslWindows Subsystem for    │
       │          │                          │ Linux[6]                 │
       │          ├──────────────────────────┼──────────────────────────┤
       │          │ prootproot[7] userspace       │
       │          │                          │ chroot/bind mount        │
       │          │                          │ emulation                │
       │          ├──────────────────────────┼──────────────────────────┤
       │          │ pouchPouch[8] Container       │
       │          │                          │ Engine                   │
       └──────────┴──────────────────────────┴──────────────────────────┘

       If multiple virtualization solutions are used, only the "innermost" is detected and
       identified. That means if both machine and container virtualization are used in
       conjunction, only the latter will be identified (unless --vm is passed).

       Windows Subsystem for Linux is not a Linux container, but an environment for running Linux
       userspace applications on top of the Windows kernel using a Linux-compatible interface.
       WSL is categorized as a container for practical purposes. Multiple WSL environments share
       the same kernel and services should generally behave like when being run in a container.

OPTIONS

       The following options are understood:

       -c, --container
           Only detects container virtualization (i.e. shared kernel virtualization).

       -v, --vm
           Only detects hardware virtualization.

       -r, --chroot
           Detect whether invoked in a chroot(2) environment. In this mode, no output is written,
           but the return value indicates whether the process was invoked in a chroot()
           environment or not.

           Added in version 228.

       --private-users
           Detect whether invoked in a user namespace. In this mode, no output is written, but
           the return value indicates whether the process was invoked inside of a user namespace
           or not. See user_namespaces(7) for more information.

           Added in version 232.

       --cvm
           Detect whether invoked in a confidential virtual machine. The result of this detection
           may be used to disable features that should not be used in confidential VMs. It must
           not be used to release security sensitive information. The latter must only be
           released after attestation of the confidential environment.

           Added in version 254.

       -q, --quiet
           Suppress output of the virtualization technology identifier.

       --list
           Output all currently known and detectable container and VM environments.

           Added in version 239.

       --list-cvm
           Output all currently known and detectable confidential virtualization technologies.

           Added in version 254.

       -h, --help
           Print a short help text and exit.

       --version
           Print a short version string and exit.

EXIT STATUS

       If a virtualization technology is detected, 0 is returned, a non-zero code otherwise.

SEE ALSO

       systemd(1), systemd-nspawn(1), chroot(2), namespaces(7)

NOTES

        1. ACRN hypervisor
           https://projectacrn.org

        2. Apple virtualization framework
           https://developer.apple.com/documentation/virtualization

        3. LMHS SRE hypervisor
           https://www.lockheedmartin.com/en-us/products/Hardened-Security-for-Intel-Processors.html

        4. Google Compute Engine
           https://cloud.google.com/compute

        5. Podman
           https://podman.io

        6. Windows Subsystem for Linux
           https://docs.microsoft.com/en-us/windows/wsl/about

        7. proot
           https://proot-me.github.io/

        8. Pouch
           https://github.com/alibaba/pouch