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When I run the update manager, it tells me to check my internet connnection. From the command line, I get the following when I run sudo apt-get update.

Err http://extras.ubuntu.com quantal Release.gpg    
  Unable to connect to extras.ubuntu.com:http:
Ign http://extras.ubuntu.com quantal Release
Ign http://extras.ubuntu.com quantal/main Sources/DiffIndex
Ign http://extras.ubuntu.com quantal/main i386 Packages/DiffIndex
Err http://extras.ubuntu.com quantal/main Translation-en_US
  Unable to connect to extras.ubuntu.com:http:
Err http://extras.ubuntu.com quantal/main Translation-en
  Unable to connect to extras.ubuntu.com:http:
Err http://extras.ubuntu.com quantal/main Sources
  Unable to connect to extras.ubuntu.com:http:
Err http://extras.ubuntu.com quantal/main i386 Packages
  Unable to connect to extras.ubuntu.com:http:
W: Failed to fetch http://ppa.launchpad.net/gezakovacs/ppa/ubuntu/dists/quantal/main/source/Sources  404  Not Found

W: Failed to fetch http://ppa.launchpad.net/gezakovacs/ppa/ubuntu/dists/quantal/main/binary-i386/Packages  404  Not Found

W: Failed to fetch http://extras.ubuntu.com/ubuntu/dists/quantal/Release.gpg  Unable to connect to extras.ubuntu.com:http:

W: Failed to fetch http://extras.ubuntu.com/ubuntu/dists/quantal/main/i18n/Translation-en_US  Unable to connect to extras.ubuntu.com:http:

W: Failed to fetch http://extras.ubuntu.com/ubuntu/dists/quantal/main/i18n/Translation-en  Unable to connect to extras.ubuntu.com:http:

W: Failed to fetch http://extras.ubuntu.com/ubuntu/dists/quantal/main/source/Sources  Unable to connect to extras.ubuntu.com:http:

W: Failed to fetch http://extras.ubuntu.com/ubuntu/dists/quantal/main/binary-i386/Packages  Unable to connect to extras.ubuntu.com:http:

E: Some index files failed to download. They have been ignored, or old ones used instead.
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possible duplicate of How can I fix a 404 Error using a PPA? –  fabricator4 Jan 6 '13 at 1:05
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closed as too localized by Jorge Castro, Eric Carvalho, gertvdijk, Ringtail, fabricator4 Jan 6 '13 at 1:05

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