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I'm having a problem with Ubuntu Software Center. When I open it, it closes automatically without any permissions. When I run it in a terminal I get this:

vangjush@vangjush:~$ software-center
2013-05-06 21:41:29,532 - softwarecenter.ui.gtk3.app - INFO - setting up proxy 'None'
2013-05-06 21:41:29,540 - softwarecenter.db.database - INFO - open() database: path=None use_axi=True use_agent=True
2013-05-06 21:41:30,052 - softwarecenter.backend.reviews - WARNING - Could not get usefulness from server, no username in config file
2013-05-06 21:41:30,061 - softwarecenter.fixme - WARNING - logs to the root logger: '('/usr/lib/python2.7/dist-packages/gi/importer.py', 51, 'find_module')'
2013-05-06 21:41:30,061 - root - ERROR - Could not find any typelib for LaunchpadIntegration
2013-05-06 21:41:30,217 - softwarecenter.ui.gtk3.app - INFO - show_available_packages: search_text is '', app is None.
2013-05-06 21:41:30,555 - softwarecenter.db.pkginfo_impl.aptcache - INFO - aptcache.open()
Traceback (most recent call last):
  File "/usr/share/software-center/softwarecenter/db/pkginfo_impl/aptcache.py", line 257, in open
    self._cache = apt.Cache(progress)
  File "/usr/lib/python2.7/dist-packages/apt/cache.py", line 102, in __init__
    self.open(progress)
  File "/usr/lib/python2.7/dist-packages/apt/cache.py", line 149, in open
    self._list.read_main_list()
SystemError: E:Malformed line 57 in source list /etc/apt/sources.list (dist parse)
2013-05-06 21:41:31,504 - softwarecenter.db.enquire - ERROR - _get_estimate_nr_apps_and_nr_pkgs failed
Traceback (most recent call last):
  File "/usr/share/software-center/softwarecenter/db/enquire.py", line 115, in _get_estimate_nr_apps_and_nr_pkgs
    tmp_matches = enquire.get_mset(0, len(self.db), None, xfilter)
  File "/usr/share/software-center/softwarecenter/db/appfilter.py", line 89, in __call__
    if (not pkgname in self.cache and
  File "/usr/share/software-center/softwarecenter/db/pkginfo_impl/aptcache.py", line 277, in __contains__
    return self._cache.__contains__(k)
AttributeError: 'NoneType' object has no attribute '__contains__'
Traceback (most recent call last):
  File "/usr/bin/software-center", line 182, in <module>
    app.run(args)
  File "/usr/share/software-center/softwarecenter/ui/gtk3/app.py", line 1387, in run
    self.show_available_packages(args)
  File "/usr/share/software-center/softwarecenter/ui/gtk3/app.py", line 1325, in show_available_packages
    self.view_manager.set_active_view(ViewPages.AVAILABLE)
  File "/usr/share/software-center/softwarecenter/ui/gtk3/session/viewmanager.py", line 151, in set_active_view
    view_widget.init_view()
  File "/usr/share/software-center/softwarecenter/ui/gtk3/panes/availablepane.py", line 173, in init_view
    self.cache, self.db, self.icons, self.apps_filter)
  File "/usr/share/software-center/softwarecenter/ui/gtk3/views/lobbyview.py", line 80, in __init__
    self.build()
  File "/usr/share/software-center/softwarecenter/ui/gtk3/views/lobbyview.py", line 324, in build
    self._build_homepage_view()
  File "/usr/share/software-center/softwarecenter/ui/gtk3/views/lobbyview.py", line 119, in _build_homepage_view
    self._append_whats_new()
  File "/usr/share/software-center/softwarecenter/ui/gtk3/views/lobbyview.py", line 253, in _append_whats_new
    whats_new_cat = self._update_whats_new_content()
  File "/usr/share/software-center/softwarecenter/ui/gtk3/views/lobbyview.py", line 238, in _update_whats_new_content
    docs = whats_new_cat.get_documents(self.db)
  File "/usr/share/software-center/softwarecenter/db/categories.py", line 131, in get_documents
    nonblocking_load=False)
  File "/usr/share/software-center/softwarecenter/db/enquire.py", line 330, in set_query
    self._blocking_perform_search()
  File "/usr/share/software-center/softwarecenter/db/enquire.py", line 225, in _blocking_perform_search
    matches = enquire.get_mset(0, self.limit, None, xfilter)
  File "/usr/share/software-center/softwarecenter/db/appfilter.py", line 89, in __call__
    if (not pkgname in self.cache and
  File "/usr/share/software-center/softwarecenter/db/pkginfo_impl/aptcache.py", line 277, in __contains__
    return self._cache.__contains__(k)
AttributeError: 'NoneType' object has no attribute '__contains__'

What's wrong? How can I fix it?

share|improve this question
    
Did you change your /etc/apt/sources.list file eg. adding a new ppa or something? If yes, remove that line and try again. –  Jobin May 7 '13 at 1:38
    
I just commented the last 5 lines of that source list. And it works perfectly. –  Morfeos May 7 '13 at 15:05
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migrated from unix.stackexchange.com May 7 '13 at 1:23

This question came from our site for users of Linux, FreeBSD and other Un*x-like operating systems..

2 Answers

up vote 2 down vote accepted

I think you need to run the software-center using elevated credentials. Most Unixes use a tool called sudo to give users the ability to do this, without having to give them the root password.

Try this command:

sudo software-center

You'll be prompted for a password, this is your normal user's password. It's just re-authenticated you to make sure you're not someone that just happen to sit down at someone else's terminal.

You can read more about the sudo command if you're interested.

References

share|improve this answer
    
Thank a lot. a lot this was really helpful reference. Cheers –  Morfeos May 7 '13 at 15:04
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Try updating from the terminal

sudo apt-get update
sudo apt-get upgrade

It would be working.

share|improve this answer
    
Did it. Now it works perfectly. Thank a lot sharkbait. Cheers –  Morfeos May 7 '13 at 15:02
    
:))) Can you approve my answer? Thanks! –  sharkbait May 7 '13 at 15:06
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