I use systemd (xenial) and want o be up to date. To do so, I install Martin Pitt's PPA and everything is fine.

On one system (not special in any way, this is a clean install actually), despite the PPA being configured ...

root@eu11:~# apt update
Get:1 http://security.ubuntu.com/ubuntu xenial-security InRelease [102 kB]
Hit:2 http://fr.archive.ubuntu.com/ubuntu xenial InRelease
Hit:3 http://fr.archive.ubuntu.com/ubuntu xenial-updates InRelease
Hit:4 http://fr.archive.ubuntu.com/ubuntu xenial-backports InRelease
Hit:5 http://ppa.launchpad.net/pitti/systemd/ubuntu xenial InRelease
Fetched 102 kB in 0s (297 kB/s)
Reading package lists... Done
Building dependency tree
Reading state information... Done
All packages are up to date.

... systemd is installed from the standard repository.

root@eu11:~# apt show systemd
Package: systemd
Version: 229-4ubuntu17
Priority: required
Section: admin
Origin: Ubuntu

What can be the reason for such behaviour? (I did not configure any pinning because I do not know how to do it, never having had the need before)

This is the output of apt-cache policy systemd :

root@eu11:~# apt-cache policy systemd
  Installed: 229-4ubuntu17
  Candidate: 229-4ubuntu17
  Version table:
 *** 229-4ubuntu17 500
        500 http://fr.archive.ubuntu.com/ubuntu xenial-updates/main amd64 Packages
        100 /var/lib/dpkg/status
     229-4ubuntu10 500
        500 http://security.ubuntu.com/ubuntu xenial-security/main amd64 Packages
     229-4ubuntu4 500
        500 http://fr.archive.ubuntu.com/ubuntu xenial/main amd64 Packages
  • What's the output of apt-cache policy systemd? – muru Jun 1 '17 at 10:40
  • @muru: I updated the question with the output, thanks. – WoJ Jun 1 '17 at 10:42
  • 3
    You said you're on 16.04, but the PPA only provides systemd for 17.04. I suppose the question now is, how did the PPA package get installed on the other systems? O.o – muru Jun 1 '17 at 10:43
  • @muru: OK,now I understand. This system is on xenial, the others are on zesty. I was under the (wrong) impression that the packages were for all systems. I am now stuck :) Thank you for your help, if you could just turn your comment into an answer I would gladly accept it. – WoJ Jun 1 '17 at 11:07
  • ali76's answer says pretty much the same thing, you can accept that. – muru Jun 1 '17 at 11:08

Because this PPA has systemd package only for the zesty (17.04) distribution.

As you can see in the following links, this PPA has the indicator-session package for Xenial (16.04) and the systemd package for zesty (17.04).

indicator-session link for xenial

systemd link for zesty

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