On Monday 27 July 2015 00:06:39 Alexandre wrote:
> Anyway you should be able to find easily a package with a name similar to
> tdesu or tdesudo in Synaptic (my preferred one) or any package manager app.
> Or sometimes the name of the app has changed to trinity-(the name of the
> app).

No tdesu.  But tdesudo and gksu are both there. So I installed gksu.

But it didn't work.  I.e., <gksu kwrite. in the launcher produced a request
for the root password - but entering the root password had no effect.