After installing Ubuntu 13.10 I try to install ubuntu-restricted-extras or any software, it shows me:
E: GPG error: http://archive.canonical.com saucy InRelease: Clearsigned file isn't valid, got 'NODATA' (does the network require authentication
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Byte Commander
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hosam
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Does the network require authentication?
Actually I had the same issue. This caused by the network proxy and you have to check your network connection settings.
d a i s y
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Manee Osman
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