Unix Important Run Level | Difference between Linux and Unix Run level

Unix Operating System It has Six Run Level
0 System is running under PROM Monitor
s or S – Single user mode with critical file system mounted and accessible
1- Single User Administrative State with access available file system.
2- Multi user mode without networking
3- Multi user mode with networking
4 –Not used
5 –Shut Down & power off
6- Reboot to the Default Run Level

Difference between Unix & Linux Run Level | comparison Between Unix and Linux run level
Same Run Level Linux and Unix System
1,2,3,4,6 these Rune level are same
Different run level

Linux	Unix
0- single user mode	0 system running under PROM
5 Graphical user mode	5 shut down
S,s Not available	S,s single user mode with critical file system