sudo find /var/lib/apt/lists/ | ag oibaf
/var/lib/apt/lists/ppa.launchpad.net_oibaf_graphics-drivers_ubuntu_dists_zesty_InRelease
/var/lib/apt/lists/ppa.launchpad.net_oibaf_graphics-drivers_ubuntu_dists_zesty_main_binary-amd64_Packages.lz4
/var/lib/apt/lists/ppa.launchpad.net_oibaf_graphics-drivers_ubuntu_dists_zesty_main_binary-i386_Packages.lz4