Re: aptitude update errors for upgrade to Jessie on amd64

[Paul E Condon <pecondon@mesanetworks.net>]

On 20150513_2054+0100, Lisi Reisz wrote:
> On Wednesday 13 May 2015 19:55:16 Bob Proulx wrote:
> > Pierre Frenkiel wrote:
> > >   I have still the same problem with "Hash Sum mismatch"
> > >   Do you have any idea on how to fix it?
> >
> > Is your system behind a proxy cache of some sort?  This problem is one
> > sometimes seen when files of different ages are cached and served
> > causing the entire set of files to be out of sync with each other.
> > This is sometimes seen when behind a caching proxy server such as
> > those on a large company network.
> >
> > There are various solutions.  I think the simplest is to change the
> > sources.list file to a different mirror.  That will have the effect of
> > asking for different URLs and will avoid the previously cached files
> > and will cause the local copies of the old files to be expired.
> >
> > You are currently using:
> >
> >   deb http://ftp.fr.debian.org/debian jessie main
> >
> > That is okay.  Good!  But for the purpose of this task change that to
> > a different but still valid mirror.  This would be a good time to try
> > out the new http redirector which has just recently become an official
> > Debian resource.[1]
> >
> >   deb http://httpredir.debian.org/debian jessie main
> >
> > That httpredir.debian.org was previously known as http.debian.net for
> > those on the list that are familiar with it.
> >
> > This is a good configuration for anyone geographically anywhere as it
> > will redirect to the best known nearby mirror.  The effect for you
> > with this problem is that it will be a different appearing URL than
> > the previously used ftp.fr.debian.org and will therefore ask for
> > different files.  The previously locally cached files on your disk in
> > /var/lib/apt will be expired as no longer being in your sources.list
> > file.  If mismatched cached proxy files are your only remaining
> > problem then this should fix it.  Make sure to 'apt-get update' after
> > changing the sources.list file.
> 
> We need to be offered this during a netinstall.  I did a netinstall yesterday, 
> and as usual was offered my bhoice of mirror in the UK.  I chose my usual 
> because over the years it has been fast and reliable - though I have a 
> regular second choice for when needed.
> 
> I would more than happily have chosen httpredir.debian.org had I been offered 
> it.
> 
> Lisi

At the very top of the pick-list of known mirrors in various parts of
the world, there is a option to type in any URL and port number that
you think will work for you (tm). I use it for accessing my approx
proxy (with port# 9999), but it should work for a mirror set up by
your neighbor across the street, or a honey pot set up by a certain
spy agency, too.

HTH

-- 
Paul E Condon           
pecondon@mesanetworks.net