(this is a copy of https://discourse.ubuntu.com/t/phased-updates-in-apt-in-21-04/20345 for everyone's attention)
Starting with this development release, with APT 2.1.16 to be precise, APT now implements phased updates. Previously, only update-manager implemented phased updates, and this was only used on desktops - the implementation in APT means this works on servers, raspberry pis, and containers, too. This means that some updates will be hold back on some machines while they are being phased. This is being decided by a value derived from the machine-id, the package name, and package version. # To control phased updates in APT: * To have all your machines phase the same, set the `APT::Machine-ID`option to a UUID like /etc/machine-id (the format is not being checked right now, but that might change); or point `Dir::Etc::machine-id` to another machine-id file. * To always include phased updates, set `APT::Get::Always-Include-Phased-Updates` to true. This is the old behavior. * To never include phased updates, set `APT::Get::Never-Include-Phased-Updates` to false. Note that this does not apply to fresh package installs. APT also respects the options from update-manager about phased updates which are similar to the ones above. This also applies to any tool using the APT library, such as aptitude and packagekit. # Special notes: * To avoid breaking existing build chroots, chroots are excluded from this change for now (as are systems without an `/etc/machine-id`). This may change in 21.10. * The `/etc/machine-id` file is looked up relatively to `Dir::Etc` setting, which is `/etc/apt`. So if you point `Dir` or `Dir::Etc` elsewhere, you might have to copy `machine-id` to the right place or set that option to `/etc/machine-id`, otherwise phasing will be disabled, and phased updates always included. -- debian developer - deb.li/jak | jak-linux.org - free software dev ubuntu core developer i speak de, en -- ubuntu-devel mailing list ubuntu-devel@lists.ubuntu.com Modify settings or unsubscribe at: https://lists.ubuntu.com/mailman/listinfo/ubuntu-devel
