manually create EM db console

#emca -config dbcontrol db -repos recreate

You have specified the following settings

Database ORACLE_HOME ................ /u01/app/oracle/product/11.1.0/db_2

Local hostname ................ hpdb1.domain.com
Listener port number ................ 1521
Database SID ................ testdb
Email address for notifications ...............
Outgoing Mail (SMTP) server for notifications ...............

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Do you wish to continue? [yes(Y)/no(N)]: y
INFO: >>>>>>>>>>> The Database Control URL is https://hpdb1.domain.com:5500/em <<<<<<<<<<<
Jul 3, 2008 11:21:57 AM oracle.sysman.emcp.EMDBPostConfig invoke
WARNING:
************************ WARNING ************************

Management Repository has been placed in secure mode wherein Enterprise Manager data will be encrypted. The encryption key has been placed in the file: /u01/app/oracle/product/11.1.0/db_2/hpdb1.domain.com_testdb/sysman/config/emkey.ora. Please ensure this file is backed up as the encrypted data will become unusable if this file is lost.

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Enterprise Manager configuration completed successfully