Oracle 10g on Oracle Linux 5.6: dbca does.. nothing?

Question

Dear all,
I successfully installed Oracle Enterprise Linux 5.6 64bit on a test server. I installed a bunch of prerequisite packages then I successfully installed Oracle 10G (10.2 for linux x86-64). During the installation I selected "no default database (only server) and no enterprise manager".
Successfully I mean, apparently!
After that I launched DBCA, and go through all steps to create my first database.
- general purpose
- no enterprise manager (disabled, anyway)
- on file system
- use database file locations from template (ORACLE_BASE is correctly set)
- no flash recovery area
- default size, charset and so on
Then I reach the last page (12). Create Database is already selected, and I select also "Generate Database Creation Scripts". I press Finish. The Confirmation page appears, I review all the stuff then I press OK.
At this point I expect the window with the progress bar of database creation (I did this tens of times before on 10g, 11g on Windows and Linux) but I simply return to the Step 12 of dbca.
In /u01/app/oracle/oradata I see an empty ORCL folder
In /u01/app/admin/ORCL I see the empty folders: adump, bdump, cdump and so on, plus scripts, that contains:
- ORCL.sh:
#!/bin/sh
mkdir -p /u01/app/oracle/admin/ORCL/adump
mkdir -p /u01/app/oracle/admin/ORCL/bdump
mkdir -p /u01/app/oracle/admin/ORCL/cdump
mkdir -p /u01/app/oracle/admin/ORCL/dpdump
mkdir -p /u01/app/oracle/admin/ORCL/pfile
mkdir -p /u01/app/oracle/admin/ORCL/udump
mkdir -p /u01/app/oracle/datafile
mkdir -p /u01/app/oracle/product/10.2.0/db_1/cfgtoollogs/dbca/ORCL
mkdir -p /u01/app/oracle/product/10.2.0/db_1/dbs
ORACLE_SID=ORCL; export ORACLE_SID
- ORCL.sql:
PROMPT specify a password for sys as parameter 1;
DEFINE sysPassword = &1
PROMPT specify a password for system as parameter 2;
DEFINE systemPassword = &2
I can't found any log and I don't understand what's wrong.
Mario.

Answer 1

You'll never believe!
I suspected about an apparently stupid warning whenever I launched dbca on command line (Xming server over ssh)
Warning: Cannot convert string "-b&h-lucida-medium-r-normal-sans-*-140-*-*-p-*-iso8859-1" to type FontStruct
I installed xming fonts and now the progress window appears and database creation is done, everything works fine! Incredible!
This lead me to see a new error, during the db creation:
ora-27125: unable to create shared memory segment.
I solved this by issuing this command
#echo "<dba_group_gid>" > /proc/sys/vm/hugetlb_shm_group
where dba_group_gid is the gid of oracle group (i.e. oinstall).