Bug#2296: debian-bugs WWW doesn't say how to find out Debian version

[Ian Jackson <ian@chiark.chu.cam.ac.uk>]

Ben Harris writes ("Bug#2296: debian-bugs WWW doesn't say how to find out Debian version"):
> Package: (debian-bugs)
>
> On <URL: http://www.cl.cam.ac.uk/users/iwj10/debian-bugs/Reporting.html>
> one is told to supply:
>
>      * The version of the whole Debian system you are using.
>
> But no indication of how to find this out is given.  It may be obvious to
> sysadmins, but it isn't obvious to us users.

So, does anyone on debian-devel know of a sound way of doing this ?
If not I should probably remove this requirement.

Ian.