If you want IPv6 disabled permanently on a Ubuntu 16.04 system, here’s a good way to do it. Disabling it like this should keep it disabled permanently, even after performing updates that could potentially enable it again without you knowing it. I haven’t tested it so I’m not 100% certain but if you decide to upgrade Ubuntu to 16.10 or the most recent version, it should still have ipv6 disabled …
How to install MP4Box on Ubuntu 16.04 Headless
“MP4Box is a multimedia packager, with a vast number of functionalities: conversion, splitting, hinting, dumping and others. It can be used for performing many manipulations on multimedia files like AVI, MPG, TS, but mostly on ISO media files (e.g. MP4, 3GP). It is a command-line tool so it can be utilized by scripts like the php script that I want to use. MP4Box is included in the GPAC package.” I want …