SYSTEMD−DETECT−VIRT - Online Linux Manual PageSection : 1
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Source : systemd 253
Note : systemd-detect-virt
NAMEsystemd-detect-virt − Detect execution in a virtualized environment
SYNOPSISsystemd−detect−virt [OPTIONS...]
DESCRIPTIONsystemd−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: .it 1 an-trap
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, 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​[1] apple Apple Virtualization​.framework​[2] sre LMHS SRE hypervisor​[3] 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 podman Podman​[4] container manager rkt rkt app container runtime wsl Windows Subsystem for Linux​[5] proot proot​[6] userspace chroot/bind mount emulation pouch Pouch​[7] 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​.
OPTIONSThe 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​. −−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​. −q, −−quiet Suppress output of the virtualization technology identifier​. −−list Output all currently known and detectable container and VM environments​. −h, −−help Print a short help text and exit​. −−version Print a short version string and exit​.
EXIT STATUSIf a virtualization technology is detected, 0 is returned, a non−zero code otherwise​.
SEE ALSOsystemd(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. Podman ­https://podman.io 5. Windows Subsystem for Linux ­https://docs.microsoft.com/en-us/windows/wsl/about 6. proot ­https://proot-me.github.io/ 7. Pouch ­https://github.com/alibaba/pouch 0
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