1. After you enter this command, your current password will be requested.
(Current) UNIX password: your_current_password
2. You will then be asked for your new password.
New UNIX password: your_new_password
Note that if you choose a password that is too simplistic, too short, or to similar to your login name, it will not be accepted. This is for security.
3. You will be asked to retype your new password for confirmation.
Retype new UNIX password: your_new_password
4. If successful, you will be presented with the following message.
passwd: all authentication tokens updated successfully.