Path: utzoo!utgpu!news-server.csri.toronto.edu!rpi!zaphod.mps.ohio-state.edu!think.com!mintaka!bloom-beacon!eru!hagbard!sunic!mcsun!corton!ircam!fingerhu
From: fingerhu@ircam.fr (Michel Fingerhut)
Newsgroups: comp.unix.internals
Subject: Re: untar only newer files (updating SunOs without wiping out disk)
Message-ID: <1991Apr20.032548.17454@ircam.fr>
Date: 20 Apr 91 03:25:48 GMT
References: <19208@rpp386.cactus.org> <6783@awdprime.UUCP> <4251@rwthinf.UUCP>
Organization: IRCAM, Paris (France)
Lines: 1

Use gnutar.  It has an option for this.