5.3 What are all those names like slink, potato, etc.?
They are just "codenames". When a Debian distribution is in the
development stage, it has no version number but a codename. The purpose of
these codenames is to make easier the mirroring of the Debian distributions (if
a real directory like unstable suddenly changed its name to
stable, a lot of stuff would have to be needlessly downloaded
Currently, stable is a symbolic link to sarge (i.e.
Debian GNU/Linux 3.1) and testing is a symbolic link to
etch. This means that sarge is the current stable
distribution and etch is the current testing distribution.
unstable is a permanent symbolic link to sid, as
sid is always the unstable distribution (see
about "sid"?, Section 5.4).