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I have some problems updating my Ubuntu

Requires installation of untrusted packages

The action would require the installation of packages from not authenticated sources.

cinnamon gir1.2-muffin-3.0 libgnome-keyring-common libgnome-keyring0 libmuffin0 muffin-common

The downloads are from the Main server, the Source code under Ubuntu Software tab is marked

Is there something I have missed?

The output of sudo apt-get update is:

W: GPG error: http://ppa.launchpad.net oneiric Release: The following signatures couldn't be verified because the public key is not available: NO_PUBKEY 6A9653F936FD5529
W: GPG error: http://ppa.launchpad.net oneiric Release: The following signatures couldn't be verified because the public key is not available: NO_PUBKEY A777609328949509
W: Duplicate sources.list entry http://archive.canonical.com/ubuntu/ oneiric/partner i386 Packages (/var/lib/apt/lists/archive.canonical.com_ubuntu_dists_oneiric_partner_binary-i386_Packages)
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1 Answer

up vote 2 down vote accepted

Running sudo apt-get update from a terminal is likely to reveal more information about which is coming from the untrusted source. This generally just means that you don't have the key for that repo yet.

If you are sure that the PPA is one you are happy to use then you can add the key with a terminal

gpg --keyserver keyserver.ubuntu.com --recv 36FD5529 28949509
gpg --export --armor 36FD5529 28949509 | sudo apt-key add -

Then update

sudo apt-get update

Hope that helps

If you want to add PPA's in future you can use the add-apt-repository command, this will get the keys as well for you.

sudo add-apt-repository ppa:user/ppa-name

As far as the duplicate is concerned I would check your sources - you can open the file for editing as root and check for duplicates.

Backup the file first

sudo cp /etc/apt/sources.list /etc/apt/sources/list.bak

Then

gksudo gedit /etc/apt/sources.list

Check for exact duplicates and put an # at the beginning of the line, save, exit and apt-get update.

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I have updated the post :) with the output –  Denees Mar 26 '12 at 6:58
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