Initdb error without much more details PostgreSQL 7.4.19

Hello,

I'm facing a trouble with the initdb execution of PostgreSQL 7.4.19 on a Redhat 4 :
[uname -a] Linux <host> 2.6.9-5.ELsmp #1 SMP Wed Jan 5 19:30:39 EST 2005 i686 i686 i386 GNU/Linux
[cat /proc/version] Linux version 2.6.9-5.ELsmp (bhcompile(at)decompose(dot)build(dot)redhat(dot)com) (gcc version 3.4.3 20041212 (Red Hat 3.4.3-9.EL4)) #1 SMP Wed Jan 5 19:30:39 EST 2005
[cat /etc/redhat-release] Red Hat Enterprise Linux ES release 4 (Nahant)

Then i install PostgreSQL binary in the order :
rpm -ivh postgresql-libs-7.4.19-1PGDG.rhel4.i686.rpm
rpm -ivh postgresql-7.4.19-1PGDG.rhel4.i686.rpm

rpm -ivh postgresql-server-7.4.19-1PGDG.rhel4.i686.rpm

Then I execute initdb with the user postgres :
-bash-3.00$ initdb -d
Running in debug mode.

initdb: internal variables:
PGDATA=/var/lib/pgsql/data
datadir=/usr/share/pgsql
PGPATH=/usr/bin
ENCODING=
ENCODINGID=0
POSTGRES_SUPERUSERNAME=postgres
POSTGRES_BKI=/usr/share/pgsql/postgres.bki
POSTGRES_DESCR=/usr/share/pgsql/postgres.description
POSTGRESQL_CONF_SAMPLE=/usr/share/pgsql/postgresql.conf.sample
PG_HBA_SAMPLE=/usr/share/pgsql/pg_hba.conf.sample
PG_IDENT_SAMPLE=/usr/share/pgsql/pg_ident.conf.sample
The files belonging to this database system will be owned by user "postgres".
This user must also own the server process.

The database cluster will be initialized with locale fr_FR.UTF-8.

fixing permissions on existing directory /var/lib/pgsql/data... ok
creating directory /var/lib/pgsql/data/base... ok
creating directory /var/lib/pgsql/data/global... ok
creating directory /var/lib/pgsql/data/pg_xlog... ok
creating directory /var/lib/pgsql/data/pg_clog... ok
selecting default max_connections... 100
selecting default shared_buffers... 1000
creating configuration files... ok
creating template1 database in /var/lib/pgsql/data/base/1... ok
initializing pg_shadow... ok
enabling unlimited row size for system tables... ok
initializing pg_depend... ok
creating system views... ok
loading pg_description... ok
creating conversions... ok
setting privileges on built-in objects... ok
creating information schema...
initdb: failed

And I need to install the cluster on another path, the result is even worst :
-bash-3.00$ initdb -d -D <targeted_folder>
Running in debug mode.

initdb: internal variables:
PGDATA=<targeted_folder>
datadir=/usr/share/pgsql
PGPATH=/usr/bin
ENCODING=
ENCODINGID=0
POSTGRES_SUPERUSERNAME=postgres
POSTGRES_BKI=/usr/share/pgsql/postgres.bki
POSTGRES_DESCR=/usr/share/pgsql/postgres.description
POSTGRESQL_CONF_SAMPLE=/usr/share/pgsql/postgresql.conf.sample
PG_HBA_SAMPLE=/usr/share/pgsql/pg_hba.conf.sample
PG_IDENT_SAMPLE=/usr/share/pgsql/pg_ident.conf.sample
The files belonging to this database system will be owned by user "postgres".
This user must also own the server process.

The database cluster will be initialized with locale fr_FR.UTF-8.

fixing permissions on existing directory <targeted_folder>... ok
creating directory <targeted_folder>/base... ok
creating directory <targeted_folder>/global... ok
creating directory <targeted_folder>/pg_xlog... ok
creating directory <targeted_folder>/pg_clog... ok
selecting default max_connections... 10
selecting default shared_buffers... 50
creating configuration files... ok
creating template1 database in <targeted_folder>/base/1...
initdb: failed

I am really stuck ... even trying to execute step by step the initdb bash script ?

Is there anybody able to understand this failure ?
Why default max_connections and shared_buffers are not the same ?

--
Laurent

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