How to change Oracle user password without showing the actual password on screen?
You can do this with the SQL*Plus password command.

To change the current user's password, just type password and you'll get the usual prompt.

$ sqlplus foo/foo123
...
SQL&gt; password
Changing password for FOO
Old password:
New password:
Retype new password:
Password changed


You can also use password username to change another user's password (if you're logged on with sufficient privileges - you need to be dba I believe).

SQL Developer also allows you to do that. Just type password and execute, and you'll get a password change popup. Or expand the "Other users" branch, right-click on the account that needs a change and select the "Edit user" menu.