Oracle Database Discussions

Hello- brand new install of 11g Standard Edition on Ubuntu Linux...
I read a helpful startup script and entered most all of the configs by hand before install.. reading the logs I can see that oracle starts up and has been configured.. though the configure app did end up complaining and did not finish completely (java and oracle proceeded to keep the dual CPU box at load 5 for the next 9 hours while I slept !!)

so now I go to start the DB and a console.. two problems:

* ulimit - whether in .bashrc, or in /etc/security/limits.conf.. I cannot get these ulimits right.. I currently have, user 'oracle'

oracle soft nproc 2047
oracle hard nproc 16384
oracle soft nofile 1024
oracle hard nofile 65536

dbstart runs without error, but
when I run emctl start dbconsole , I get the msg -- ulimit: 25: Bad Number
followed by

OC4J Configuration issue. /u01/app/oracle/product/11.1.0/db_1/oc4j/j2ee/OC4J_DBConsole_hps-desktop_lin11 not found

well, I am not used to the terms yet.. my ORACLE_SID = lin11
but I know I have a database called orcl

so looking in the directory, I see
OC4J_DBConsole_hps-desktop_orcl

hmm.. dont know what to make of that mixup
clarifications for Up and Running Install welcome

thanks