How can I change my root or extra password?

To change your extra or root kerberos password, use the following command:

For example, if you are joeuser and wish to change the password for your extra instance, you would type:

This works in the same way the passwd command normally works, i.e.: you will be prompted for your old password, and then a new one, which you will have to enter twice, to safeguard against any typos.