How do I change my password? [duplicate]
How do I change my password for Ubuntu?
Solution 1:
Go to the command prompt and type
passwd
and follow the steps.
Solution 2:
System > Administration > Users and Groups
You'll see the option to change it there.
Solution 3:
In System -> Administration -> Users and Groups
Click on the Change... button
The next dialog will then prompt you for your old password and your new one: