I faced this recently and had to install OS on a laptop which did not have a DVD drive, and only had USB option available.
Netstat is very useful utility for debugging network issues on linux.The following information can be obtained from netstat : route tables, ports open closed, interface details, Adress families as TCP, UDP & Unix domain sockets.
Flazr is a Java implementation of protocols such as RTMP used for multimedia streaming. The Flazr project includes a streaming media server and related utilities.
A list of mostly all of the ffmpeg commands that can be used in daily use for conversion, creating images, editing videos . Read the post below for more details.