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Why I am unable to update Ubuntu anymore. I keep getting the following feedback:

Check your Internet connection. 
Failed to fetch http://security.ubuntu.com/ubuntu/pool/multiverse/f/flashplugin-nonfree/flashplugin-installer_11.2.202.291ubuntu0.12.04.1_i386.deb 404  Not Found [IP: 91.189.91.15 80] 
Failed to fetch http://security.ubuntu.com/ubuntu/pool/multiverse/f/flashplugin-nonfree/flashplugin-downloader_11.2.202.291ubuntu0.12.04.1_i386.deb 404  Not Found [IP: 91.189.91.15 80]

My internet connections are OK. So what is the problem?

Alaa Ali
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Kamal Aranki
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2 Answers2

4

It seems that you need to update your sources, because the Update Manager is trying to fetch an older version of that flashplugin (it's trying to fetch 11.2.202.291, when 11.2.202.297 is the one found at security.ubuntu.com right now). Try following the below steps:

  1. Close your Update Manager, and open it up again. You should see something like this:

    enter image description here.

    If you do, wait for it to finish, then try updating. It should work. If not, follow the below.

  2. Open a terminal by Ctrl+Alt+T.
  3. Type sudo apt-get clean and Enter. Enter your password when prompted.
  4. Type sudo apt-get update and Enter. Enter your password if prompted.
  5. Once it's done, open up your Update Manager, and try to update again. If not:
  6. In that terminal, type sudo apt-get upgrade and Enter. This command is the equivalent of what Update Manager does, except now you look geek-ier.
Alaa Ali
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This is usually caused when the ppa locations can not be found.

To try to fix this, go to System Settings and click on the Software and Updates link

enter image description here

Now Click on the Other Software tab:

enter image description here

If you de-select ALL these locations and try update again it should work (make a note of the ones that are active first).

Once you have successfully updated the system, Start re-enabling them again, one at a time until the update fails, then you can deselect just the ones that do not work.

Update

If it is caused by the proxy settings take a look at this answer 'apt-get' does not work with Proxy

Community
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Simon
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  • Except the error is not because of a PPA, but http://security.ubuntu.com/. – Alaa Ali Jul 29 '13 at 09:30
  • I saw the answer for this yesterday, I'll see if I can find it again. I made the same mistake then! Sorry... Found the link and have added it to my answer – Simon Jul 29 '13 at 09:32