Change Enterprise manager password for 11g

For the DB Control Release 11.2 and higher, you need to set the environment variable ORACLE_UNQNAME to the value of the DB_UNIQUE_NAME database parameter.

Steps :

1.Stop the DB Control
On Unix
$ emctl stop dbconsole

On Windows
Open a Command Window and type
**> emctl stop dbconsole

2.Check that the DB Control is stopped
 On Unix
$ emctl status dbconsole
 

On Windows
Open a Command Window and type
 **>emctl status dbconsole

3.Connect to the database as a user with DBA privilege with SQL*Plus and execute:

SQL> alter user sysman identified by ;
 
4.Check the new password
SQL> connect sysman/[@database_alias]
 
5.From the database directory $ORACLE_HOME/bin, execute:
On Unix

$ emctl setpasswd dbconsole
Provide the new SYSMAN password
 
On Windows

**>: emctl setpasswd dbconsoleProvide the new SYSMAN password
 
6.Restart the DB Control
On Unix
$ emctl start dbconsole
 
On Windows
Open a DOS Command Window and type
**>: emctl start dbconsole
 

Thank you 

Osama Mustafa

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