I added the apt repo per the Debian instructions at https://flirc.tv/ubuntu-software-installation-guide to my Ubuntu 16.04 system. Trying to run 'apt update' gives me the following error:
Err:10 http://apt.flirc.tv/arch/x64 binary/ Release
404 Not Found
E: The repository 'http://apt.flirc.tv/arch/x64 binary/ Release' does not have a Release file.
N: Updating from such a repository can't be done securely, and is therefore disabled by default.
N: See apt-secure(8) manpage for repository creation and user configuration details.
I don't mean to be an ass but it shouldn't be 2-3 days of effort to properly set up an apt repo. https://blog.packagecloud.io/eng/2015/08/04/apt-repository-internals/