Before the installation during the -preinst check there were few issues which were resolved (ex user equivalence). Database Configuration Assistant when a database is created User ignored prerequisites during installation.3- To solve ORA-28547 error: You need to check Oracle Net administration: There's no log file in oraInve all components installed successfully but 'Database Configuration Assistant' failed so database also didn't installed successfully. Ideally, your /etc/hosts file should look something like this. , oracle-l at FreeLists During an Enterprise Edition or Standard Edition installation on the database server, Oracle Net Configuration Assistant automatically configures a listener with a name of LISTENER that has a TCP/IP listening protocol address for Oracle Database. The ORA-12638 is an Oracle database error, indicating that the SQL*Net client was unable to connect to the database. After that try again installing the database configuration. We will only install the database software binaries first, because I want to show you more in deep details the command “ DBCA – Database Configuration Assistant “. Oracle configuration assistant failures are noted at the bottom of the installation screen. Oracle database configuration assistant failed during installation I have landed to the same and found it very simple or say the silly mistakes we do, which should not be a good practice for any DBA :-( … Thanks for contributing an answer to Stack Overflow! Please be sure to answer the question.

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