The Black Lab Enterprise Linux Testing build 261 is here to upgrade the kernel packages to version 4.8.0-53 from Ubuntu 16.04 LTS, include the build-essential package by default, as well as the OpenVPN utility, improve the installer, fix a black screen issue with VMWare, and add YUM and RPM support. Other than the above, Black Lab Enterprise Linux Testing build 261 also comes with the Ukuu utility for testing different mainline kernels, the latest Chromium 58 web browser, and the Vivacious icon se by default.