Change your password
It is a good idea to change your password from time to time, especially if you think someone else knows what your password is.
Click your name in the menu bar and select User Accounts.
Click the label next to Password.
The label should look like a series of dots or boxes if you already have a password set.
Enter your current password, then a new password. Enter your new password again in the Confirm password field.
You can also click the button next to the New password field to select a randomly generated secure password. These passwords are hard for others to guess, but they can be hard to remember, so be careful.
Make sure you. This will help to keep your user account safe.
Change the keyring password
If you change your login password, it may become out of sync with the keyring password. The keyring keeps you from having to remember lots of different passwords by just requiring one master password to access them all. If you change your user password (see above), your keyring password will remain the same as your old password. To change the keyring password (to match your login password):
Open the Passwords and Keys application from the dash.
In the Passwords tab, right-click on Passwords: login. Select Change Password.
Enter your Old Password, followed by your new Password, and Confirm your new password by entering it again.