power management

Command	SysVinit	Systemd
1. System halt	halt (et shutdown)	systemctl halt
2. Power off	poweroff (et shutdown)	systemctl poweroff
3. Reboot	reboot (et shutdown)	systemctl reboot
4. Suspend	pm-suspend	systemctl suspend
5. Hibernate	pm-hibernate	systemctl hibernate

Pour des raisons de compatibilité, systemd utilise des liens symboliques de halt, poweroff, reboot,… vers systemctl.

see man systemctl :

• systemctl isolate halt.target has the shorthands:
  • shutdown -H now
  • systemctl halt
  • plain unadorned halt
• systemctl isolate reboot.target has the shorthands:
  • shutdown -r now
  • telinit 6
  • systemctl reboot
  • plain unadorned reboot
• systemctl isolate poweroff.target has the shorthands:
  • shutdown -P now
  • telinit 0
  • shutdown now
  • systemctl poweroff
  • plain unadorned poweroff
• systemctl isolate rescue.target has the shorthands:
  • telinit 1
  • systemctl rescue
• systemctl isolate multi-user.target has the shorthands:
  • telinit 2
  • telinit 3
  • telinit 4
• systemctl isolate graphical.target has the shorthand:
  • telinit 5

Pour en savoir plus

• man systemd.special : liste des units (et donc des targets) créés par systemd
• man bootup : diagrammes de boot avec les targets

Post TRES intéressant pour plus de détails.