This article draws a parallel between the old ?SysVinit and the current systemd initialization.
Keep in mind that you can always omit the .service and .target extensions, especially if you're temporarily editing the ?kernel parameters when bootloader menu shows up. Easier to remember, as well.
Commands
?SysVinit |
systemd |
Information |
rc.d {start | stop | restart} daemon |
systemctl {start | stop | restart} daemon.service |
Change service state. |
rc.d list |
systemctl list-unit-files --type=service |
List Services. |
update-rc.d foo enable |
systemctl {enable | disable} daemon.service |
Turn service on or off. |
Targets table
SysV Runlevel |
systemd Target |
Notes |
0 |
runlevel0.target, poweroff.target |
Halt the system. |
1, s, single |
runlevel1.target, rescue.target |
Single user mode. |
2, 4 |
runlevel2.target, runlevel4.target, multi-user.target |
User-defined/Site-specific runlevels. By default, identical to 3. |
3 |
runlevel3.target, multi-user.target |
Multi-user, non-graphical. Users can usually login via multiple consoles or via the network. |
5 |
runlevel5.target, graphical.target |
Multi-user, graphical. Usually has all the services of runlevel 3 plus a graphical login. |
6 |
runlevel6.target, reboot.target |
Reboot |
emergency |
emergency.target |
Emergency shell |