how to check shell environment in virtualbox ,docker , physical machine
systemd-detect-virtresult is none means
systemd-detect-virt
systemd-detect-virt
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, without KVM
kvm
Linux KVM kernel virtual machine, with whatever software, except Oracle Virtualbox
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
m[blue]ACRN hypervisorm[][1]
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
m[blue]Podmanm[][2] container manager
rkt
rkt app container runtime
wsl
m[blue]Windows Subsystem for Linuxm[][3]
proot
m[blue]prootm[][4] userspace chroot/bind mount emulation
pouch
m[blue]Pouchm[][5] 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.