How to identify if your Linux is a physical system and Virtual Machine ?

 dmidecode -t system


[root@uscdcoie0056 ~]# dmidecode -t system
# dmidecode 3.3
Getting SMBIOS data from sysfs.
SMBIOS 2.7 present.

Handle 0x0001, DMI type 1, 27 bytes
System Information
        Manufacturer: VMware, Inc.
        Product Name: VMware7,1
        Version: None
        Serial Number: VMware-42 02 59 9f 9d 04 92 f7-7b 39 72 e5 6c 0f 61 ff
        UUID: 9f590242-049d-f792-7b39-72e56c0f61ff
        Wake-up Type: Power Switch
        SKU Number: Not Specified
        Family: Not Specified

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