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[ubuntu] Unable To Use Update Manager?

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linux-howto

http://ubuntuforums.org – Can't use Update Manager gives me these messages? Could not download all repository indexes The repository may no longer be available or could not be contacted because of network problems. If available an older version of the failed index will be used. Otherwise the repository will be ignored. Check your network connection and ensure the repository address in the preferences is correct. and.... An error occurred The following details are provided: E: Could not open lock file /var/lib/apt/lists/lock - open (2: No such file or directory) E: Unable to lock the list directory (Hardware)