how to make rn "catch up"?

[interran at Shasta.ARPA]

I'd like to know if there's a way to update my .newsrc file such
that all newsgroups are marked read. The rn manual page doesn't
seem to help so that's why I'm asking the net.

I only posted to net.unix because it seemed like the best place to
do so. I'm not a regular reader of this group so I'd prefer reply
by mail. Thanks.

John Interrante/ interran at su-shasta.arpa/ ...decwrl!Glacier!Shasta!interran