In update on 12th April I received this mgs.

These were deselected and the update them continued.

I am using Ubuntu 11.10 OS and Dell Dimension 2400

Please advise.

Requires installation of untrusted packages

The action would require the installation of packages from unauthenticated sources.

Library for accessing GData webservices - common data files
libgdata-common(Size 110 kB)

Library for accessing GData webservices – shared libraries
libgdata13 (Size 253 kB)

libgdata-common libgdata13

Kind of a common sight.

You have to decide if that is what you want to do. I'd guess that most folks say OK or yes to it. It would tend to suggest to me that you already have some software that is not completely stock. I guess it could be a sources issue too.

By the way, welcome.

error....sorry

It is easy to query the web site for a package (see for example http://packages.ubuntu.com/libgdata-common) and look up packaged details (see for example https://launchpad.net/ubuntu/+source...0.1-1~oneiric1) including checksums. Official PPAs have GPG keys that should be used for instance the release key for oneiric-bleed is at http://ppa.launchpad.net/oneiric-ble...dists/oneiric/ IIRC. See the official Ubuntu documentation on how to add keys or see something like http://linuxers.org/howto/how-instal...are-ubuntu-ppa. Then all Debian-esque distributions should ship with the "debsums" package to run hash checks on installed packages.

*What I'm trying to say is that making an informed decision what to do should IMHO be based on what the distribution offers in terms of package management configuration, package lookups and verification and not on something as vague as "I guess most folks say OK".