You can log in to your account from the following link: Oracle Enterprise Manager
Once you have logged in with your username and given password, change your password. Here are some restrictions on your Oracle passwords:
On the inital page of the Oracle Enterprise Manage select the Server tab on the top. On the next page, under the section Security, select Users.
Find your username among the list of users and select it. Then click on Edit. Enter your new password and confirm it. If you are unable to change your password through the Oracle Enterprise Manager, try the instructions below to change your password through SQL Developer.
Install the SQL Developer on your machine. Go through the tutorial on SQL Developer. Here are some options for you to connect to your Oracle database:
Connection Name: db_<loginName> Hostname: rising-sun.microlab.cs.utexas.edu Port: 1521 SID: orclIf you are on your home computer, you can save your settings.
In the top right window of SQL Developer type the following
command:
Alter User <login_name> identified by <new_password>;
Then click the Execute Statement icon / button on the top. You can
hover your mouse over the buttons and locate it. In the SQL Developer
on my Macintosh it is the first button. You should see the outcome
in the Results window directly below or on the bottom bar that the
command was executed.