In the SunOS release 4 software, the config command was used to generate system configuration files that enabled /vmunix to be relinked from object files. The need for this command has been removed by the following Solaris 7 features:
Loadable modules
The /etc/system file (see the system(4) man page)
Device tree information from the OpenBoot PROM (OBP)
The driver.conf files in /kernel/drv and /usr/kernel/drv