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[ubuntu] Some installed programs missing after LiveCD upgrade

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linux-howto

http://ubuntuforums.org – So I recently had a crash in the middle of an upgrade to 12.04 over the Internet, and it said the installed packages were still downloaded, but it couldn't establish a connection. After trying a few more times and getting the same error, and then restarting, I found that Update Manager no longer displayed a "Upgrade to New Version" button, and I could no longer install new programs using apt-get because it said a connection couldn't be established (although other Internet-using programs still worked). After posting for help here, I got no responses, so I eventually burned a LiveCD a (Hardware)