From time to time it will be necessary to change your password. Unlike other systems which store the encrypted password so that hackers can see them, this system is setup so that only root may access your password. This to some extent eliminates the need for highly cryptic passwords. However the longer a password remains in use, the more likely it becomes insecure. To this end the system is setup to age old passwords and eventually expire them if they are not changed regularly.
To change your password, use the following command:
If all went well, your new password will be accepted and you will use that new password from then on. If not you will be alerted and informed to start over.