Starting SC/CS on Linux
Alex Peshkov posted some more (interesting) info about this in fb-devel list:
The only difference between [starting] classic and superclassic is different server binary to start – classic is started by fb_inet_server (started by xinetd) and super – fb_smp_server, started by fbguard, started by /etc/init.d script. You can remove fb_smp_server, fbguard and startup scripts – and you will get poor classic package. To get superclassic package – remove fb_inet_server and xinetd startup file, and slightlychange install script.
Must say that this is anyway not a longterm solution. Since 3.0 we will not have separate packages – single package will serve all needs, including SS, and choice of operation mode will be done using firebird.conf.