Command line interface for Dropbox application on Linux headless install is the only way (currently) to access/change the application's preferences. The accessible options of preferences are subset of all available options (on graphical interface comparison basis). There is lot of queries for variety of such options accessibility through the command line all over the Dropbox forum (including as different ideas). For some reason most of the queries seems ignored (almost). The idea of mine is a way all graphicaly accessible options to be available for Linux headless install with just letting the preferences dialog be activated trough the command line (one move - many solutions ).
The Dropbox application supports "Dropbox Preferences" dialog activation only through "Preferences..." entry in context menu of the application taskbar icon (available only on graphical environment, of course). Would be fine a subcommand like "preferences", for example, be available throug the command line (i.e. something like "dropbox preferences" on the command line) which do the same like hit on "Preferences..." entry, nothing more. This should be no more than few lines of code (including empty lines for improved readability).
In such a way any workstation, used for connection and managenment of a Linux headless install and supporting X interface (not limited to Linux), can display the entire preferences (without limitations). Just a recall: a graphical application isn't required to be installed on a machine with available graphical environment to provide a graphical interface (the interface could be redirected ). Another recall: Dropbox daemon is the same for graphical and for headless install on Linux (i.e. confirming: very limited changes).