tool of the day: netstat

Want to know what's going on in your box?  Use netscan.  It will name every port along with the application that uses it.

$ sudo netstat -nlp

Unix Tree

You can get a nice directory tree that diagrams your file structure with the command "tree" (it's not installed on Ubuntu 14.04 ls by default--just sudo apt-get install tree.)  It's nice for communicating a layout quickly.

$tree