How do I cnage my user password

I have just been given a webbook with ubuntu installed and would like to know how can I change my user password from the one I entered on the initial set up. I like to change my passwords fairly regular for safety. I would appreciate any help in this matter as I am a first time user of any Linux operating system.

Change User Password

To manually set a password for the root user, type in the following in the shell: sudo passwd After that you are asked to type in the new root password twice. Finally, your root user has its own password.

actually if you do  "sudo

actually if you do  "sudo passwd"  it will change the password of the connected account in the terminal   , if you want to change another user password like root or put a password on root (non by default in Ubuntu) you type "sudo passwd root" or any other account name