Next, verify whether the wiringPi is installed successfully or not:
wiringPi includes a command-line utility gpio which can be used to program
and set up the GPIO pins. You can use it to read and write the pins or even
control them from shell scripts.
You can verify whether the wiringPi is installed successfully or not by the
following commands:
$ sudo gpio -v
$ sudo gpio readall
If the information above is shown, it indicates that the wiringPi has been
installed successfully.
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