manually run 'sudo dpkg --configure -a'

Asked by Ranjitha

When iam tring add new apps, in add or remove, or trying to update withe update manager, a error message comes saying,
  " E: dpkg was interrupted, you must manually run 'sudo dpkg --configure -a' to correct the problem.
    E: _cache->open() failed, please report. "
What shall i do now , please halp me as quick as possible

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Ubuntu update-manager Edit question
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Peterson Silva (petersonsilva) said :

It seems there was a problem while upgrading; please do the following:

1) Open a terminal (Applications -> Acessories -> Terminal)
2) Run

sudo dpkg --configure -a

and wait till it finishes. After that you may close the terminal.
3) Now, if everything went well, you'll be able to install / remove / upgrade software =)

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Nick Ellery (nick.ellery) said :

Nick Ellery suggests this article as an answer to your question:
FAQ #52: “'dpkg --configure -a' problem when trying to run Synaptic”.

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