| Sysvinit Command | Systemd Command | Notes |
|---|---|---|
| service frobozz start | systemctl start frobozz | Used to start a service (not reboot persistent) |
| service frobozz stop | systemctl stop frobozz | Used to stop a service (not reboot persistent) |
| service frobozz restart | systemctl restart frobozz | Used to stop and then start a service |
| service frobozz reload | systemctl reload frobozz | When supported, reloads the config file without interrupting pending operations. |
| service frobozz condrestart | systemctl condrestart frobozz | Restarts if the service is already running. |
| service frobozz status | systemctl status frobozz | Tells whether a service is currently running. |
| ls /etc/rc.d/init.d/ | systemctl (or) systemctl list-unit-files --type=service (or) ls /lib/systemd/system/.service /etc/systemd/system/.service | Used to list the services that can be started or stopped. Used to list all the services and other units. |
| chkconfig frobozz on | systemctl enable frobozz | Turn the service on, for start at next boot, or other trigger. |
| chkconfig frobozz off | systemctl disable frobozz | Turn the service off for the next reboot, or any other trigger. |
| chkconfig frobozz | systemctl is-enabled frobozz | Used to check whether a service is configured to start or not in the current environment. |
| chkconfig --list | systemctl list-unit-files --type=service (or) ls /etc/systemd/system/*.wants/ | Print a table of services that lists which runlevels each is configured on or off |
| chkconfig frobozz --list | ls /etc/systemd/system/*.wants/frobozz.service | Used to list what levels this service is configured on or off |
| chkconfig frobozz --add | systemctl daemon-reload | Used when you create a new service file or modify any configuration. |
| Sysvinit 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 |
| Sysvinit Command | Systemd Command | Notes |
|---|---|---|
| telinit 3 | systemctl isolate multi-user.target (OR systemctl isolate runlevel3.target OR telinit 3) | Change to multi-user run level. |
| sed s/^id:.*:initdefault:/id:3:initdefault:/ | ln -sf /lib/systemd/system/multi-user.target /etc/systemd/system/default.target | Set to use multi-user runlevel on next reboot. |