Defining environment variable ORACLE_SID

While I was trying to open Oracle Enterprise Manager Console in client browser by starting the dbconsole process I got the following error message:

Error:  Environment variable ORACLE_SID not defined. Please define it.

Defining environment variable ORACLE_SID

Steps:

1. Navigate into your ORACLE_HOME/bin directory.
2. set ORACLE_SID = dbname.

Now...

To Start dbconsole

./emctl start dbconsole

For Windows:

emctl start dbconsole

To Start dbconsole

./emctl stop dbconsole

For Windows:
emctl stop dbconsole


View the status of dbconsole

./emctl status dbconsole

For Windows:
emctl status dbconsole