update manager not working

[sreenathan]

i am a learner, only today i installed my ubuntu, while i want to update, the following message appears, E: dpkg was interrupted, you must manually run 'dpkg --configure -a' to correct the problem.
E: _cache->open() failed, please report.

when i pasted this in terminal, it asks for superuser permission, which i do not know, either superuser name or the way to enter the same. Please help. Thanking you.

[Connor Imes (ckimes)]

You should be using sudo with that command in order to get superuser privileges. Please run:
sudo dpkg --configure -a
This isn't a bug, it's just how the package management system works when it is interrupted. I will mark this bug as invalid, but feel free to post back any results or feedback.
Thank you.

[Connor Imes (ckimes)]

Also, you can read more about root and sudo here - https://help.ubuntu.com/community/RootSudo
The Ubuntu Forums are probably the best place to get fast help, so visit them at http://ubuntuforums.org/ and visit the Absolute Beginner Talk section. Happy Ubuntu-ing!