Starting up Oracle DB listener

I have Oracle Database 11g Express Edition installed in my Fedora 16. It is not set to auto startup when my PC first launch for the purpose of saving resources. Now I'm going to do it manually to startup and shutdown the Oracle DB. There are a list of environment variable locate inside bin/oracle_env.sh must be set before doing this, otherwise an error message saying that command not found will be shown.

Let's first check on the status to make sure the DB isn't up, type:

lsnrctl status

following output will be shown on the screen:

Connecting to (DESCRIPTION=(ADDRESS=(PROTOCOL=IPC)(KEY=EXTPROC_FOR_XE)))
 TNS-12541: TNS:no listener
  TNS-12560: TNS:protocol adapter error
   TNS-00511: No listener
    Linux Error: 111: Connection refused

Connecting to (DESCRIPTION=(ADDRESS=(PROTOCOL=TCP)(HOST=huahsin68.fedora)(PORT=1521)))
 TNS-12541: TNS:no listener
  TNS-12560: TNS:protocol adapter error
   TNS-00511: No listener
    Linux Error: 111: Connection refused 

Now lets start the Oracle, type:

su -c 'lsnrctl start'

following output is shown:

Starting /u01/app/oracle/product/11.2.0/xe/bin/tnslsnr: please wait...

TNSLSNR for Linux: Version 11.2.0.2.0 - Production
System parameter file is /u01/app/oracle/product/11.2.0/xe/network/admin/listener.ora
Log messages written to /u01/app/oracle/product/11.2.0/xe/log/diag/tnslsnr/huahsin68/listener/alert/log.xml
Error listening on: (DESCRIPTION=(ADDRESS=(PROTOCOL=IPC)(KEY=EXTPROC_FOR_XE)))
TNS-12555: TNS:permission denied
 TNS-12560: TNS:protocol adapter error
  TNS-00525: Insufficient privilege for operation
   Linux Error: 1: Operation not permitted

Listener failed to start. See the error message(s) above...

To fix this error, modify the configuration file:

/u01/app/oracle/product/11.2.0/xe/network/admin/listener.ora

by changing KEY = EXTPROC_FOR_XE to KEY = EXTPROC0.

Lets give it another try, following output will be shown:
Starting /u01/app/oracle/product/11.2.0/xe/bin/tnslsnr: please wait...

TNSLSNR for Linux: Version 11.2.0.2.0 - Production
System parameter file is /u01/app/oracle/product/11.2.0/xe/network/admin/listener.ora
Log messages written to /u01/app/oracle/product/11.2.0/xe/log/diag/tnslsnr/huahsin68/listener/alert/log.xml
Listening on: (DESCRIPTION=(ADDRESS=(PROTOCOL=ipc)(KEY=EXTPROC0)))
Listening on: (DESCRIPTION=(ADDRESS=(PROTOCOL=tcp)(HOST=huahsin68.fedora)(PORT=1521)))

Connecting to (DESCRIPTION=(ADDRESS=(PROTOCOL=IPC)(KEY=EXTPROC0)))
STATUS of the LISTENER
------------------------
Alias                     LISTENER
Version                   TNSLSNR for Linux: Version 11.2.0.2.0 - Production
Start Date                22-JAN-2012 12:25:33
Uptime                    0 days 0 hr. 2 min. 20 sec
Trace Level               off
Security                  ON: Local OS Authentication
SNMP                      OFF
Default Service           XE
Listener Parameter File   /u01/app/oracle/product/11.2.0/xe/network/admin/listener.ora
Listener Log File         /u01/app/oracle/product/11.2.0/xe/log/diag/tnslsnr/huahsin68/listener/alert/log.xml
Listening Endpoints Summary...
  (DESCRIPTION=(ADDRESS=(PROTOCOL=ipc)(KEY=EXTPROC0)))
  (DESCRIPTION=(ADDRESS=(PROTOCOL=tcp)(HOST=huahsin68.fedora)(PORT=1521)))
Services Summary...
Service "PLSExtProc" has 1 instance(s).
  Instance "PLSExtProc", status UNKNOWN, has 1 handler(s) for this service...
The command completed successfully

Although the listener is up, anyhow there are some problem with the database instance.