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proc Info

PC Model / Manufacturer / BIOS:

sudo cat /sys/devices/virtual/dmi/id/{sys_vendor,product_{family,version,name},bios_version}

cd /sys/devices/virtual/dmi/id/
for f in *; do
        printf "$f "
        cat $f 2>/dev/null || echo "***_Unavailable_***"
done

ARM systems:

sudo cat /sys/firmware/devicetree/base/model

Example output

Intel NUC:

$ sudo cat /sys/devices/virtual/dmi/id/{sys_vendor,product_{family,version,name},bios_version}
Intel(R) Client Systems
TN
M11924-404
NUC11TNHi5
TNTGL357.0042.2020.1221.1743

$ sudo cat /sys/devices/virtual/dmi/id/{sys_vendor,product_{family,version,name},bios_version}
Intel(R) Client Systems
Intel NUC
J72747-303
NUC8i5BEH
BECFL357.86A.0073.2019.0618.1409

VMWare:

$ sudo cat /sys/devices/virtual/dmi/id/{sys_vendor,product_{family,version,name},bios_version}
VMware, Inc.

None
VMware Virtual Platform
6.00

RPI:

$ sudo cat /sys/firmware/devicetree/base/model
Raspberry Pi Zero W Rev 1.1