- Booting Sequence :
1. Boot PROM phase in sparc box and BIOS in intel based box
2. Initial boot program will be initiated - bootblk will be loaded from boot device.
3. Starting the Unix kernel which will be done by ufsboot.
4. Kernal will load all the necessary modules and starts the init process.
5. The init process will start run control (rc) scripts which will start all the required process based on the run level.
Run Levels :
0 ---> Go into firmware (sparc)
1 ---> Single user mode.
2 ---> Multi-user mode without networking.
3 ---> Extend multi-user mode with networking.
4 ---> Not defined.
5 ---> Shut down.
6 ---> Reboot.
Detailed Topics: