[Tut] How to change currently loggedin user password

1) Select you username on your top righthand corner and now you should see similar to the following screen here click on your username

2) Once it opens user details window you need to click on “Change Password…”

3) Now Password change window will appear, enter your password and click on “Change Password…”

http://www.ubuntugeek.com/ubuntu-lucid-tiphow-to-change-currently-loggedin-user-password.html#more-5632