# cat /etc/sysconfig/oracle-xe
ORACLE_DBENABLED=false
LISTENER_PORT=1521
HTTP_PORT=8080
CONFIGURE_RUN=true
# /etc/init.d/oracle-xe enable
# /etc/init.d/oracle-xe start
When shutdown:
# /etc/init.d/oracle-xe stop
# /etc/init.d/oracle-xe disable
If you use GUI "Start Database", the Listener doesn't start up, so you have to load it manually.
# su - oracle
$ . oracle_env.sh
$ lsnrctl start
Now you can see that the port 1521 and 8080 are up, and you can manipulate the database by using browser and SQL*Net.