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How do I deal with “unauthenticated sources” errors in the Software Center?
How to install software or upgrade from old unsupported release?

I am using ubuntu 10.10, here i am not able install any paint tool. If i try to install some tool, it will show below message in a dialog box.

 Requires installation of untrusted packages

 The action would require the installation of packages from not
 authenticated sources.

Please suggest some paint tool along with installation steps.

Also i have tried $ sudo apt-get update but it is showing like below

...

Err http://in.archive.ubuntu.com maverick-updates/multiverse i386 Packages 404 Not Found [IP: 91.189.92.200 80]

Fetched 198B in 22s (9B/s)

W: Failed to fetch http://extras.ubuntu.com/ubuntu/dists/maverick/main/source/Sources.gz 404 Not Found

...

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Ubuntu 10.10 is End-of-Life and the Extras repository does not have any software for this version of Ubuntu anymore. Upgrade to a newer stable release of Ubuntu. –  gertvdijk Jan 30 '13 at 22:48
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marked as duplicate by Rinzwind, gertvdijk, Eric Carvalho, Eliah Kagan, MestreLion Jan 31 '13 at 9:24

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1 Answer

Try removing any PPAs you added, and switching from the Indian mirrors to another mirror using the Software Sources tool.

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Exactly, i don't know what all PPAs i need to remove? –  Shruthi Ramesh Jan 30 '13 at 10:16
    
1) The error is not about PPAs. 2) Mirror says: 404 correctly because it's EOL'd –  gertvdijk Jan 31 '13 at 0:57
    
EOL means End-Of-Life, that release of Ubuntu is no longer supported and the mirrors don't contain packages for it any more. –  Flimm Jan 31 '13 at 10:27
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