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usman@usmanPC:~$ software-center
2012-11-20 18:23:17,310 - - INFO - setting up proxy 'None'
2012-11-20 18:23:17,320 - softwarecenter.db.database - INFO - open() database: path=None use_axi=True use_agent=True
2012-11-20 18:23:17,671 - - WARNING - Could not get usefulness from server, no username in config file
2012-11-20 18:23:17,868 - - INFO - show_available_packages: search_text is '', app is None.
2012-11-20 18:23:17,928 - softwarecenter.db.pkginfo_impl.aptcache - INFO -
Segmentation fault (core dumped)
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closed as off topic by Christopher Kyle Horton, Jorge Castro, Mik, belacqua, ajmitch Nov 20 '12 at 20:11

Questions on Ask Ubuntu are expected to relate to Ubuntu within the scope defined by the community. Consider editing the question or leaving comments for improvement if you believe the question can be reworded to fit within the scope. Read more about reopening questions here.If this question can be reworded to fit the rules in the help center, please edit the question.

Welcome to Ask Ubuntu! This type of problem is actually a bug, and is thus offtopic. It is recommended that you file a bug report on Launchpad instead, providing all the details you have given here in addition to any that the developers may ask you for. Thanks! – Christopher Kyle Horton Nov 20 '12 at 19:03
As a temporary fix try issuing sudo rm /var/cache/apt/*.bin as indicated [here] (, on Ubuntu forums. – GunJack Dec 23 '13 at 0:11