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Rather than the chmod of the printers /dev node, the user could probably be added to the `lp` group to grant the correct permissions.

"Just `chmod 777` it" as the universal solution to permission issues is usually solving the wrong problem.

To be fair, chmod 777 is a perfectly acceptable workaround for a single-user, single-purpose system.

Forgot to mention that in the article, but I tried that as well. Added `lp` group to both the pi and root users, to no avail.