Cannot Authenticate for updates.

What is the output of the commands

sudo apt-get update
sudo apt-get dist-upgrade

jim@JES-Aspire-4736Z:~$ sudo apt-get update
[sudo] password for jim:
Sorry, try again.
[sudo] password for jim:
Sorry, try again.
[sudo] password for jim:
Sorry, try again.
sudo: 3 incorrect password attempts
jim@JES-Aspire-4736Z:~$ sudo apt-get dist-upgrade
[sudo] password for jim:
Sorry, try again.
[sudo] password for jim:

Will not accept my correct password.
??????

Ok, now I understand your problem:
Entering the password for the sudo command fails (and it probably fails for all commands, not only when trying to install updates).

Are you sure that the password that you enter is correct? Due to the fact that you do not get any feedback when typing it is hard to check that it is correctly entered. There might e.g. be a wrong keyboard setting that special characters are wrongly interpreted. If you open a terminal and type in your password simply at the command prompt, are the characters correctly shown? (Do not press enter, but delete all characters with the backspace key for security reasons!)

Do you have to enter your password for logging in, or have you set autologin without asking for the password?

Password is correct, I have to enter it after boot for the keyring. I have auto login so no password is needed for bootup.

Are you sure that your user password and the keyring passphrase are identical?

I have never had a different password, nor have I ever had to enter more than one password, or any different password.

----- Original Message -----
From: "James Sandberg" <email address hidden>
To: <email address hidden>
Sent: Monday, October 12, 2015 5:57:50 AM
Subject: Re: [Question #272290]: Cannot Authenticate for updates.

Your question #272290 on Aptdaemon changed:
https://answers.launchpad.net/aptdaemon/+question/272290

    Status: Needs information => Open

You gave more information on the question:
Password is correct, I have to enter it after boot for the keyring. I
have auto login so no password is needed for bootup.

--
You received this question notification because you asked the question.

I suggest that you try changing your password by using the command

passwd

in a terminal window. What is the outcome?

I tried to change my password. The system would not change it. Response was a "token ring authentication error".

Thinking about scrapping 14.04 & going to version 15.

What about this "Policykit-1-gnome" deal?????

----- Original Message -----
From: "question272290" <email address hidden>
To: <email address hidden>
Sent: Tuesday, October 13, 2015 2:03:02 AM
Subject: Re: [Question #272290]: Cannot Authenticate for updates.

Your question #272290 on Aptdaemon changed:
https://answers.launchpad.net/aptdaemon/+question/272290

    Status: Open => Answered

Manfred Hampl proposed the following answer:
I suggest that you try changing your password by using the command

passwd

in a terminal window. What is the outcome?

--
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know that it is solved:
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https://answers.launchpad.net/aptdaemon/+question/272290

You received this question notification because you asked the question.

You might try resetting your password using the instructions in http://www.psychocats.net/ubuntu/resetpassword
If that also fails, I assume that a new installation would be the faster solution.

Please note that an Ubuntu "version 15" does not exist. There is Ubuntu 15.04 (with support from April 2015 until January 2016) and Ubuntu 15.10 (will be published later this month, and support until middle next year).
Only the LTS versions (14.04 from April 2014 and 16.04 to be published in April next year) have a support period of five years.