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    (ORA-12547: TNS:lost contact | ORA-12541: TNS:no listener)Installing Oracle 11gR2 on Ubuntu 12.04 on amazon VM




      I have installed Oracle 11gR2 on Ubuntu 12.04 on amazon VM using following doc.

      all components installed successfully but 'Database Configuration Assistant' failed so database also didn't installed successfully.
      I have created new database using dbca. database created successfully but keep giving the warning 'ORA: 12547: TNS: lost contact' many times within database installation.

      After that i try to connect database but failed.


      when i give complete string "sqlplus user/pwd@service"

      it give following error

      ORA-12541: TNS:no listener


      when i connect as "sqlplus /nolog"

      it connect to sql prompt

      then on sql prompt i do "SQL> conn /as sysdba"

      it give following error

      ORA-12547: TNS:lost contact


      Moreover my service is working but listener is not responding at all.
      if i pass any of following command the os didn't return any error or warning or anything and os prompt jump to next line.

      lsnrctl status listener_name

      lsnrctl start listener_name

      lsnrctl stop listener_name


      what i have already done by reading the different forums is as under, but it didn't worked.


      cd $ORACLE_HOME/bin

      chmod 6751 oracle

      above didn't worked for me.

      $ORACLE_HOME/root.sh from root
      above didn't worked for me.


      cd $ORACLE_HOME/bin relink

      above didn't worked for me.

      can some one help me out of (ORA-12547: TNS:lost contact | ORA-12541: TNS:no listener)?

      I wonder the installation doc i use may missed any package need install on os.


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