Unattended-upgrade uses ufc(1) to manage the related conffiles and ucf creates those copies during the update. Starting with u-u 1.4 README.md recommends creating separate configuration files in /etc/apt/apt.conf.d to avoid updates to conflict with local changes.
Latest apt ignores the .ucf-* files which is the right thing IMO and either giving warning or not giving a warning is OK on apt's side. ** Bug watch added: Debian Bug tracker #812380 https://bugs.debian.org/cgi-bin/bugreport.cgi?bug=812380 ** Also affects: unattended-upgrades (Debian) via https://bugs.debian.org/cgi-bin/bugreport.cgi?bug=812380 Importance: Unknown Status: Unknown ** Changed in: unattended-upgrades (Ubuntu) Status: New => Won't Fix ** Changed in: unattended-upgrades (Ubuntu) Importance: Undecided => Wishlist -- You received this bug notification because you are a member of Ubuntu Touch seeded packages, which is subscribed to unattended-upgrades in Ubuntu. https://bugs.launchpad.net/bugs/1645687 Title: 50unattended-upgrades.ucf-dist Status in unattended-upgrades package in Ubuntu: Won't Fix Status in unattended-upgrades package in Debian: Unknown Bug description: During a refresh procedure of Ubuntu-Mate 16.04 (on 29th November, 2016) the following notice appeared in the first line of the terminal. (Refreshing among others the linux- image-4.4.0-51-generic_4.4.0-51.72_i386.deb package): N: "50unattended-upgrades.ucf-dist" file(s) has/have been left out of consideration in the "/etc/apt/apt.conf.d/ map having invalid file extension. To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/unattended-upgrades/+bug/1645687/+subscriptions -- Mailing list: https://launchpad.net/~touch-packages Post to : touch-packages@lists.launchpad.net Unsubscribe : https://launchpad.net/~touch-packages More help : https://help.launchpad.net/ListHelp
