Changing your password frequently is a way to help prevent unauthorized access to your system.

1. Type the passwd command after the system prompt and press return.

2. When the prompt old password appears, type your current password and press return.

3. When the prompt new password appears, type your new password and press return.

4. When prompted, retype the new password and press return. (The system requires this for verification.)

Example
$ passwd
passwd: Changing password for your username
Enter login password:
New password:
Reenter new passwd:
$

Tip : If you are the Superuser, you will not be prompted for old password when changing user passwords.