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Sounds extremely basic, yet I could not actually find the meaning of the different options available to configure unattended-upgrades... In particular, what is the difference between these two ? "${distro_id}:${distro_codename}"; "${distro_id}:${distro_codename}-updates";

[Edit]: One good source of explanations can be found here (thanks @muru): https://help.ubuntu.com/community/UbuntuUpdates but I haven't been able to find an explanation anywhere for what the first line (without '-[type]') refers to...

I've noticed that having the first line activated will automatically update MySQL for example. If not, I get MySQL packages as 'available but not updated'... I want to go for option 1, but I'd just like to understand why ! :)

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  • @muru thanks for the link, does provide some interesting info (I've edited to include this) - however I'm still stumped on that first line.
    – caccia
    Feb 1 '17 at 9:36
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    Found a little more info (in French) about where this came from: forum.ubuntu-fr.org/viewtopic.php?id=2002081 : a while back, following an upgrade I got an extra "50unattended-upgrades.ucf-old" file created. The difference between new and old versions was the first line mentioned in my post. So it seems to be a new option, for what it's worth !
    – caccia
    Feb 1 '17 at 9:46
  • Have a look at for that one wiki.ubuntu.com/SecurityTeam/…
    – muru
    Feb 1 '17 at 9:52
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    @muru - I'll take that! "The release pocket is simply the name of the release, and the other pockets are denoted by <release name>-<pocket>." Still not 100% sure what that really means, but I've now got an explanation and I know my first line refers to the release pocket - Thanks !!!
    – caccia
    Feb 1 '17 at 10:00
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The first line was added in unattended-upgrades package Version: 0.90ubuntu0.1:

Modify data/50unattended-upgrades.Ubuntu such that the release pocket is an allowed origin so that security updates with a new dependency will be upgraded and the new dependency will be installed.

from: https://www.ubuntuupdates.org/package/core/xenial/main/updates/unattended-upgrades

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