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)
       ┌──────────┬────────────────┬──────────────────────────┐
       │Type      │ ID             │ Product                  │
       ├──────────┼────────────────┼──────────────────────────┤
       │VM        │ qemu           │ QEMU software            │
       │          │                │ virtualization           │
       │          ├────────────────┼──────────────────────────┤
       │          │ kvm            │ Linux KVM kernel virtual │
       │          │                │ machine                  │
       │          ├────────────────┼──────────────────────────┤
       │          │ 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)            │
       │          ├────────────────┼──────────────────────────┤
       │          │ xen            │ Xen hypervisor (only     │
       │          │                │ domU, not dom0)          │
       │          ├────────────────┼──────────────────────────┤
       │          │ bochs          │ Bochs Emulator           │
       │          ├────────────────┼──────────────────────────┤
       │          │ uml            │ User-mode Linux          │
       │          ├────────────────┼──────────────────────────┤
       │          │ parallels      │ Parallels Desktop,       │
       │          │                │ Parallels Server         │
       ├──────────┼────────────────┼──────────────────────────┤
       │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 │
       │          ├────────────────┼──────────────────────────┤
       │          │ rkt            │ rkt app container        │
       │          │                │ runtime                  │
       │          ├────────────────┼──────────────────────────┤
       │          │ wsl            │ Windows Subsystem for    │
       │          │                │ Linux[1]                 │
       └──────────┴────────────────┴──────────────────────────┘

       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.

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

       -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)

NOTES

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