Sim, você faz neste caso - ele deve lhe dar uma mensagem depois de instalar o RPM que isso deve ser feito (veja abaixo)
rpm -ivh oracle-xe-11.2.0-1.0.x86_64.rpm
Preparing... ########################################### [100%]
1:oracle-xe ########################################### [100%]
Executing post-install steps...
You must run '/etc/init.d/oracle-xe configure' as the root user to configure the database.