Runlevel (serviços)

/etc/rc.d

Systemd

/etc/rc[0-6].d

/etc/inittab (xx:4:initdefault:)

chkconfig --list <service>

chkconfig--level 345 <service> on

chkconfig --level 016 <service> off

systemctl status <service>

systemctl enable/disable <service>

systemctl isolate <target>

systemctl set-default <target>

/lib/systemd/system

update-rc.d <service> default <após> <antes>

update-rc.d <service> start 3 4 5

update-rc.d <service> stop 0 1 6

systemctl is-enabled <service>

systemctl list-units -t target

telinit 1