Le jeudi 14 février 2019 à 09:40:46+0100, K E N O a écrit : > Hi, > > Thanks for your help! :) I thought so, too, but I still doesn’t work. In > detail, I changed my `/etc/apt/sources.list` to: > > > ## Note, this file is written by cloud-init on first boot of an instance > > ## modifications made here will not survive a re-bundle. > > ## if you wish to make changes you can: > > ## a.) add 'apt_preserve_sources_list: true' to /etc/cloud/cloud.cfg > > ## or do the same in user-data > > ## b.) add sources in /etc/apt/sources.list.d > > ## c.) make changes to template file > > /etc/cloud/templates/sources.list.debian.tmpl > > ### > > > > # See > > http://www.debian.org/releases/stable/i386/release-notes/ch-upgrading.html > > # for how to upgrade to newer versions of the distribution. > > deb http://deb.debian.org/debian stretch main contrib non-free > > deb-src http://deb.debian.org/debian stretch main contrib non-free > > > > ## Major bug fix updates produced after the final release of the > > ## distribution. > > deb http://security.debian.org/ stretch/updates main contrib non-free > > deb-src http://security.debian.org/ stretch/updates main contrib non-free > > deb http://deb.debian.org/debian stretch-updates main contrib non-free > > deb-src http://deb.debian.org/debian stretch-updates main contrib non-free > > > > ## Uncomment the following two lines to add software from the 'backports' > > ## repository. > > ## > > ## N.B. software from this repository may not have been tested as > > ## extensively as that contained in the main release, although it includes > > ## newer versions of some applications which may provide useful features. > > deb http://deb.debian.org/debian stretch-backports main contrib non-free > > deb-src http://deb.debian.org/debian stretch-backports main contrib non-free > > Then I tried to execute `sudo apt update` and `sudo apt install > mailman3-full`; the result is the same:
The backports are pinned to not be installed from by default. You need to use the -t option. `sudo apt install -t stretch-backports mailman3-full` Regards. -- Pierre-Elliott Bécue GPG: 9AE0 4D98 6400 E3B6 7528 F493 0D44 2664 1949 74E2 It's far easier to fight for one's principles than to live up to them.