Greg Wooledge:
Wheezy used sysvinit and related pacakges, not systemd. Jessie does have the file-hierarchy(7) man page that Jonathan mentioned.Debian 7 had systemd, and the sharp-eyed who read the URL will have noticed that I pointed to the Debian 7 version of that manual page.
Have a manual page from Ubuntu 14, which likewise did in fact have systemd, to go with it:
* http://manpages.ubuntu.com/manpages/trusty/man8/pam_systemd.8.html This stuff does go back quite a number of years, now.* https://lists.freedesktop.org/archives/systemd-devel/2010-October/000686.html
Greg Wooledge:
The sharp-eyed will have also spotted that that is untrue. At least one of the things that I pointed to most definitely is not systemd.All of the stuff Jonathan is describing is from systemd,