DISTRO_PORTING

   1 Porting systemd To New Distributions
   2
   3 HOWTO:
   4         You need to make the follow changes to adapt systemd to your
   5         distribution:
   6
   7         1) Find the right configure parameters for:
   8
   9             -D rootprefix=
  10             -D sysvinit-path=
  11             -D sysvrcnd-path=
  12             -D rc-local=
  13             -D halt-local=
  14             -D loadkeys-path=
  15             -D setfont-path=
  16             -D tty-gid=
  17             -D ntp-servers=
  18             -D dns-servers=
  19             -D support-url=
  20
  21         2) Try it out. Play around (as an ordinary user) with
  22         '/usr/lib/systemd/systemd --test --system' for a test run
  23         of systemd without booting. This will read the unit files and
  24         print the initial transaction it would execute during boot-up.
  25         This will also inform you about ordering loops and suchlike.
  26
  27 NTP POOL:
  28         By default, systemd-timesyncd uses the Google Public NTP servers
  29         time[1-4].google.com, if no other NTP configuration is available. They
  30         serve time that uses a leap second smear, and can be up to .5s off from
  31         servers that use stepped leap seconds.
  32
  33         https://developers.google.com/time/smear
  34
  35         If you prefer to use leap second steps, please register your own
  36         vendor pool at ntp.org and make it the built-in default by
  37         passing --with-ntp-servers= to configure. Registering vendor
  38         pools is free:
  39
  40         http://www.pool.ntp.org/en/vendors.html
  41
  42         Use -D ntp-servers= to direct systemd-timesyncd to different fallback
  43         NTP servers.
  44
  45 DNS SERVERS:
  46         By default, systemd-resolved uses the Google Public DNS servers
  47         8.8.8.8, 8.8.4.4, 2001:4860:4860::8888, 2001:4860:4860::8844 as
  48         fallback, if no other DNS configuration is available.
  49
  50         Use -D dns-servers= to direct systemd-resolved to different fallback
  51         DNS servers.
  52
  53 PAM:
  54         The default PAM config shipped by systemd is really bare bones.
  55         It does not include many modules your distro might want to enable
  56         to provide a more seamless experience. For example, limits set in
  57         /etc/security/limits.conf will not be read unless you load pam_limits.
  58         Make sure you add modules your distro expects from user services.
  59
  60         Pass -D pamconfdir=no to meson to avoid installing this file and
  61         instead install your own.
  62
  63 CONTRIBUTING UPSTREAM:
  64         We generally do no longer accept distribution-specific patches to
  65         systemd upstream. If you have to make changes to systemd's source code
  66         to make it work on your distribution, unless your code is generic
  67         enough to be generally useful, we are unlikely to merge it. Please
  68         always consider adopting the upstream defaults. If that is not
  69         possible, please maintain the relevant patches downstream.
  70
  71         Thank you for understanding.