Oracle Database Discussions

I'm installing an Oracle 10g XE, my host has this specifications:

$ cat /proc/version

Linux version 2.6.18-3-amd64 (Debian 2.6.18-8) (waldi@debian.org) (gcc version 4.1.2 20061115 (prerelease) (Debian 4.1.1-20)) #1 SMP Sun Dec 10 19:57:44 CET 2006

$ uname -a
Linux XhostnameX 2.6.18-3-amd64 #1 SMP Sun Dec 10 19:57:44 CET 2006 x86_64 GNU/Linux

I followed the steps:

apt-get install libc6-i386
dpkg -i --force-architecture libaio_0.3.104-1_i386.deb
dpkg -i –-force-architecture oracle-xe_10.2.0.1-1.0_i386.deb

The installation completed successfully , and I cofigured oracle (/etc/init.d/oracle-xe configure) with the correct values.

Afterwards, I set oracle environment. Listener starts successfully but I obtain oracle this status:

Alias LISTENER
Version TNSLSNR for Linux: Version 10.2.0.1.0 - Production
Start Date 11-APR-2008 11:52:49
Uptime 0 days 0 hr. 36 min. 46 sec
Trace Level off
Security ON: Local OS Authentication
SNMP OFF
Default Service XE
Listener Parameter File /usr/lib/oracle/xe/app/oracle/product/10.2.0/server/network/admin/listener.ora
Listener Log File /usr/lib/oracle/xe/app/oracle/product/10.2.0/server/network/log/listener.log
Listening Endpoints Summary...
(DESCRIPTION=(ADDRESS=(PROTOCOL=ipc)(KEY=EXTPROC_FOR_XE)))
(DESCRIPTION=(ADDRESS=(PROTOCOL=tcp)(HOST=XhostNAMEX)(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

*********** In other installations on Windows or linux(FC6,FC7) I had more services like "XE", "XEDB", "XE_XPT" and they had instace "XE" with status READY.*******

Finally, when I tried to execute sqlplus, I had the follow errors:

ERROR:
ORA-01034: ORACLE not available
ORA-27101: shared memory realm does not exist
Linux Error: 2: No such file or directory

I thought I had some errors during intallation, cause I don't have some files like alertXE.log.

Thanks in advance.