title: Linux Utility to `Go to definition`s
body: <p>I'm starting to develop a fairly large app and am beginning to want some of the IDE features I've used in the past, such as 'right-click->go to definition' of a function.  Does any kind of parallel in developing on the command line exist?  This is on an Ubuntu Desktop VM.  Is recommended to move to using <a href="https://stackoverflow.com/questions/16235706/sublime-3-set-key-map-for-function-goto-definition">Sublime</a>?</p>