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Have not knowingly introduced any PPA's and am not sure how to access application sources list? What I have done is untick each of the three packages in turn and find consequentially libpsclite1 & rsync downloaded just fine. This left tzdata the 'can't be authenticated' culprit, but why? On Sat, 2011-04-30 at 10:06 +0100, Grant Sewell wrote: > Do you have any non official repositories in your application sources > list? Things like PPAs, etc? > > Grant > > > On 30 Apr 2011 09:28, "Guy Backhouse" <hilguy@xxxxxxxxxx> wrote: > > > > Update Manager is bringing up a 'Summary' screen warning that the > > updates about to be installed "can't be authenticated" > > > > The exact warning reads: > > "You are about to install software that can't be authenticated! > > Doing this could allow a malicious individual to damage or take > > control > > of your system" > > > > The packages concerned are; > > libpcsclite1 (version 1.5.3-1ubuntu4.1) will be upgraded to version > > 1.5.3-1ubuntu4.2 > > rsync (version 3.0.7-1ubuntu1) will be upgraded to version > > 3.0.7-1ubuntu1.1 > > tzdata (version 2011e-0ubuntu0.10.04) will be upgraded to version > > 2011g-0ubuntu0.10.04 > > > > What's going on here, should I be concerned, any advice is > > appreciated > > but the bottom line - is it safe to do the download? > > > > Guy > > > > > > > > > > -- > > The Mailing List for the Devon & Cornwall LUG > > http://mailman.dclug.org.uk/listinfo/list > > FAQ: http://www.dcglug.org.uk/listfaq > -- The Mailing List for the Devon & Cornwall LUG http://mailman.dclug.org.uk/listinfo/list FAQ: http://www.dcglug.org.uk/listfaq