查看是物理机还是虚拟机

1、

$ dmidecode | grep Product
	Product Name: KVM

2、

$ dmidecode -s system-product-name
KVM

3、

$ dmesg | grep -i virtual

[    0.000000] Booting paravirtualized kernel on KVM
[    0.371892] KVM setup paravirtual spinlock
[    1.073490] input: VirtualPS/2 VMware VMMouse as /devices/platform/i8042/serio1/input/input2
[    1.073682] input: VirtualPS/2 VMware VMMouse as /devices/platform/i8042/serio1/input/input3
[    1.131477] systemd[1]: Detected virtualization kvm.
[    1.205052] systemd[1]: Starting Setup Virtual Console...