systemd systemd-detect-virt 1 systemd-detect-virt Detect execution in a virtualized environment systemd-detect-virt OPTIONS 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: Type ID Product 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 acrn ACRN hypervisor apple Apple Virtualization.framework sre LMHS SRE hypervisor 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-nspawn1 docker Docker container manager podman Podman container manager rkt rkt app container runtime wsl Windows Subsystem for Linux proot proot userspace chroot/bind mount emulation pouch Pouch 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. 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 chroot2 environment. In this mode, no output is written, but the return value indicates whether the process was invoked in a chroot() environment or not. --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_namespaces7 for more information. --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. -q --quiet Suppress output of the virtualization technology identifier. --list Output all currently known and detectable container and VM environments. --list-cvm Output all currently known and detectable confidential virtualization technologies. If a virtualization technology is detected, 0 is returned, a non-zero code otherwise. systemd1, systemd-nspawn1, chroot2, namespaces7