I noticed a warning on the top bar (Ubuntu 12). It says an error
occured, please run package manager. I did so an got the following:
E: Encountered a section with no Package: header
E: Problem with MergeList
E: The package lists or status file could not be parsed or opened.
E: _cache->open() failed, please report.
Googling that I got
which gives instructions. I am writing here to see that this is the
correct thing to do.
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