I successfully installed Oracle 11g R2 on my laptop for evaluation, by mixing various sources of documentation. I saw the Oracle daemons after installation. But I have a few problems :

  • After a reboot, the instance does not start, and does not even create a log file. (only the TNSLSNR starts).
  • The oracle user's ORACLE_SID gets a default value (AL32UTF8) where the value I set in the /etc/profile.d/oracle.sh initialisation script is INFO (created during install). Where does this come from?
  • Where can I start investigating?

Thanks for your help.

Note : Only one line not commented out in the /etc/oratab file :


Best regards,


  • Seems strange that the ORACLE_SID is AL32UTF8 - that is the character set... Is there an /etc/oratab file on your system? If so, edit your question with its contents. – Philᵀᴹ May 19 '13 at 11:21
  • Well, understanding the content of this oratab file, my instance is not supposed to be started ! I modify it in order to allow the database to start ... – user1185081 May 19 '13 at 15:59

Edit your /etc/oratab file to read:


I guess it's just one of those things you need to know to look for!

  • Note : ORACLE_SID = AL32UTF8 is a default value set at install by OIU and used in the /home/oracle/.profile file. It was automatically initialised each time I was switching to oracle user typing "su - oracle". – user1185081 May 21 '13 at 19:51

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