[lubuntu] Synaptic Package manager: Error on launch

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http://ubuntuforums.org – Hi, I am not able to open the synaptic package manager. I am using Lubuntu 12.04. I get the following error when I try to launch synaptic manager. E: Type '<html>' is not known on line 3 in source list /etc/apt/sources.list.d/medibuntu.list E: The list of sources could not be read. Go to the repository dialog to correct the problem. E: _cache->open() failed, please report. How do I get rid of the error? May be this extra information is helpful. I got this error after i tried to run the code below as my adobe flash plugin was not working. sudo -E wget --output-document=/etc/apt/so (Hardware)