Setting up DBConsole for a database

• Verify if dbsnmp user exist:
• select * from all_users where username= 'DBSNMP'
• Grant users the right privileges:
• alter user DBSNMP identified by "<new password>" ;
• alter user DBSNMP account unlock ;
• Ensure remote login is enabled
• Ensure REMOTE_LOGIN_PASSWORDFILE=EXCLUSIVE is set in the init.ora for the database
•  show parameters remote% ;
• Ensure password file exist in $ORACLE_HOME/dbs. Else create it as under: 
• $ orapwd file=$ORACLE_HOME/dbs/orapw$ORACLE_SID password=< some password> entries= 5
• Create DBConsole along with repos:
• emca -config dbcontrol db -repos create
• For additional info refer to
• https://support.oracle.com/CSP/main/article?cmd=show&id=278100.1&type=NOT
• Verify that dbconsole is up and running
• emctl status dbconsole
  

  If you recreated the db, just recreate the dbcontrol repos as under:

  emca -config dbcontrol db -repos recreate
• If db console is running on your server, you can access EM through browser as under:
• http://servername:5500/em