Back to systemd     • For a more comprehensive and authoritative
list, consult the Interface Portability And Stability Chart The
following interfaces will not necessarily be kept stable for
now, but we will eventually make a stability promise for these
interfaces too. In the meantime we will however try to keep
breakage of these interfaces at a minimum:     • All "special"
units that aren't listed above. The following interfaces are
considered private to systemd, and are not and will not be
covered by any stability promise:    • Undocumented switches to
systemd, systemctl and otherwise    • The internal protocols
used on the various sockets such as the sockets
/run/systemd/shutdown, /run/systemd/private. One of the main
goals of systemd is to unify basic Linux configurations and
service behaviors across all distributions. For facilities
systemd provides a replacement for the various distribution
specific configuration flavors, the current #ifdef TARGET_XXX
style compatibility will eventually be removed from t