Pinfo

The pinfocommand allows to know the information on the Pi board.

On a Raspberry Pi model B :

$ pinfo
Name            : RaspberryPi B
Family          : RaspberryPi
Database Id     : 9
Manufacturer    : Sony
Board Revision  : 0xe
SoC             : Bcm2708 (Broadcom)
Memory          : 512MB
GPIO Id         : 2
PCB Revision    : 2
Serial Ports    : /dev/ttyAMA0

On a NanoPi Neo Plus 2:

$ pinfo
Name            : NanoPi Neo+ 2
Family          : NanoPi
Database Id     : 36
Manufacturer    : Friendly ARM
Board Tag       : nanopineoplus2
SoC             : H5 (Allwinner)
Memory          : 1024MB
GPIO Id         : 4
I2C Buses       : /dev/i2c-0
Serial Ports    : /dev/ttyS0,/dev/ttyS1

See also pinfo(1) manpage.