The SunOS 5.7 system is the Sun version of AT&T's System V Release 4 (SVR4). The system administration model is different from those in previous SunOS releases, which were more like 4.3 BSD. Differences important to device driver writers are:
Halting and booting the machine (see the Solaris Transition Guide).
Kernel configuration (see Chapter 5, Autoconfiguration).
Software packaging (see the Application Packaging Developer's Guide).
For general SVR4 system administration information, see the Solaris Transition Guide.