Installing APEX on Oracle 11g from Database Troubleshooting

I installed Oracle 11g on Oracle Linux from a VM Image. So I am good with Oracle Installation.

Now my interest is to use APEX on this database.

I followed the instructions on the following page:
http://download.oracle.com/docs/cd/E10513_01/doc/install.310/e10496/db_install.htm#CBHCDBAB

After the installation is complete and I tried to access
http://localhost:8080/apex/apex_admin, I kept getting username/password for xdb account.
I tried unlocking the account xdb and anonymous using
alter user xdb account unlock;
alter user anonymous account unlock;

It didnt work.

If it works for you then, you will be able to access the site. That site requires admin as username.
You will need to change the password for this user in the database by executing the following command:
sql> @apxxepwd.sql <admin123>
This command is found in $ORACLE_HOME/apex

Then I tried executing apex_epg_config script found in
/ora/db/11.1.0/apex

It asks for a parameter. This parameter should be /ora/db/11.1.0
eg.
sql> @apex_epg_config $ORACLE_HOME

It basically loads the apex images to the database. Instructions for executing this script is not well-documented.

But still the problem remains the same. I am not able to access the website.

Now I stop the listener.
$ lsnrctl stop

and then
$lsnrctl start

Copyright (c) 1991, 2007, Oracle. All rights reserved.

Starting /ora/db/11.1.0/bin/tnslsnr: please wait...

TNSLSNR for Linux: Version 11.1.0.6.0 - Production
System parameter file is /ora/db/11.1.0/network/admin/listener.ora
Log messages written to /ora/diag/tnslsnr/oracle2go/listener/alert/log.xml
Listening on: (DESCRIPTION=(ADDRESS=(PROTOCOL=tcp)(HOST=oracle2go.us.oracle.com)
(PORT=1521)))
Listening on: (DESCRIPTION=(ADDRESS=(PROTOCOL=ipc)(KEY=EXTPROC1521)))

Connecting to (DESCRIPTION=(ADDRESS=(PROTOCOL=TCP)(HOST=oracle2go.us.oracle.com)
(PORT=1521)))
STATUS of the LISTENER
------------------------
Alias LISTENER
Version TNSLSNR for Linux: Version 11.1.0.6.0 - Production
Start Date 03-FEB-2009 08:26:18
Uptime 0 days 0 hr. 0 min. 0 sec
Trace Level off
Security ON: Local OS Authentication
SNMP OFF
Listener Parameter File /ora/db/11.1.0/network/admin/listener.ora
Listener Log File /ora/diag/tnslsnr/oracle2go/listener/alert/log.xml
Listening Endpoints Summary...
(DESCRIPTION=(ADDRESS=(PROTOCOL=tcp)(HOST=oracle2go.us.oracle.com)(PORT=1521))
)
(DESCRIPTION=(ADDRESS=(PROTOCOL=ipc)(KEY=EXTPROC1521)))
The listener supports no services
The command completed successfully

Then waited for 5 minutes. Somehow it didnt work for me the next instant. I think it takes some time to refresh.

Now I can access the
http://localhost:8080/apex website.

The key is to restart the listener after unlocking the xdb account.

There is another page that I hit while searching for the solutions to APEX installation:
http://www.uaex.edu/srea/Application_Express_Installation.htm