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I have issues with updates for the OwnCloud desktop release:

teddy@Yoga-2:~$ sudo apt-get update --allow-unauthenticated
[sudo] password for teddy: 
Hit:1 http://archive.ubuntu.com/ubuntu xenial InRelease
Ign:2 http://download.opensuse.org/repositories/isv:/ownCloud:/desktop/Ubuntu_15.10  InRelease
Get:3 http://archive.ubuntu.com/ubuntu xenial-updates InRelease [94,5 kB]
Get:4 http://download.opensuse.org/repositories/isv:/ownCloud:/desktop/Ubuntu_15.10  Release [1023 B]
Get:5 http://download.opensuse.org/repositories/isv:/ownCloud:/desktop/Ubuntu_15.10  Release.gpg [189 B]
Ign:5 http://download.opensuse.org/repositories/isv:/ownCloud:/desktop/Ubuntu_15.10  Release.gpg
Hit:6 http://download.opensuse.org/repositories/isv:/ownCloud:/desktop/Ubuntu_15.10  Packages
Hit:7 http://archive.ubuntu.com/ubuntu xenial-backports InRelease
Get:8 http://archive.ubuntu.com/ubuntu xenial-security InRelease [94,5 kB]
Get:9 http://archive.ubuntu.com/ubuntu xenial-updates/main amd64 Packages [242 kB]
Get:10 http://archive.ubuntu.com/ubuntu xenial-updates/main i386 Packages [238 kB]
Get:11 http://archive.ubuntu.com/ubuntu xenial-updates/universe amd64 Packages [130 kB]
Get:12 http://archive.ubuntu.com/ubuntu xenial-updates/universe i386 Packages [127 kB]
Fetched 927 kB in 0s (1111 kB/s)                          
Reading package lists... Done
W: GPG error: http://download.opensuse.org/repositories/isv:/ownCloud:/desktop/Ubuntu_15.10  Release: The following signatures couldn't be verified because the public key is not available: NO_PUBKEY 977C43A8BA684223
W: The repository 'http://download.opensuse.org/repositories/isv:/ownCloud:/desktop/Ubuntu_15.10  Release' is not signed.
N: Data from such a repository can't be authenticated and is therefore potentially dangerous to use.
N: See apt-secure(8) manpage for repository creation and user configuration details.

This is no the first time I have issues updating Ownclous but this time I cannot resolve this. Can you please help? How do I authenticate explicitly the repo? P.S. Adding the GPG key as suggested does not resolve the issue. I remember adding it when installing the client.

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1 Answer 1

Reset to default
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There is now an Owncloud client repository for 16.04, so update your sources.list (just replace 15.10 with 16.04) and try again.

And if you have not yet added the GPG key for the repository, do it as indicated on the Owncloud client download page:

wget http://download.opensuse.org/repositories/isv:ownCloud:desktop/Ubuntu_16.04/Release.key
sudo apt-key add - < Release.key
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  • I tried the first part and the resources list for OwnCloud seem to be in /etc/apt/sources.list.d so and it already had the record for 16.04 but I added the same record in sources.list and this helped downloading almost all upgrades. I also added 15.10 but this made no difference I think. Now the message is: The following packages have been kept back: libowncloudsync0 owncloud-client owncloud-client-l10n 0 upgraded, 0 newly installed, 0 to remove and 3 not upgraded. I tried adding the CPG key but this did not help. I might try uninstalling the application.
    – Teddy Markov
    Jul 5, 2016 at 8:58
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    If you are running apt-get upgrade, try apt-get dist-upgrade or apt upgrade. (You can aldo do a search for "packages have been kept back".)
    – fkraiem
    Jul 5, 2016 at 9:03
  • sudo apt-get dist-upgrade actually helped installing the rest of the updates. Thank you for resolving my issue!
    – Teddy Markov
    Jul 5, 2016 at 9:05
  • + Note that if you have previously stored a Release.key the system will automatically enumerate. I wasn't vigilant, and just copied the steps above -- with no joy. Then I noticed the Release.key had been saved as Release.key.3 -- and adding that tiny tweak to the apt-key add line made all the difference (of course!).
    – Dɑvïd
    Oct 12, 2016 at 7:53
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    @Dɑvïd Yes, this problem can be avoided by not storing the key on disk and passing it to apt-key directly, with wget [...] -O - | sudo apt-key add -.
    – fkraiem
    Oct 12, 2016 at 7:55

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