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sudo stands for Super User Do. It allows users to run programs with the security privileges of another user (if configured access permissions allow it), by default the superuser and is therefore prefixed before commands when full access to the operating system is required.

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Accessing gpio not working as non-root. "Can't open /dev/mem: : Permission denied"

I am attempting to get a c++ program to access the gpio as non-root. I am on a raspi 2 running Jessie. I followed the instructions on issue: Access GPIO pins without root. No access to /dev/mem. Try r …
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