How to repair apt-get command?

Question

When I try to install new package with apt-get install, it doesn't work. apt-get update doesn't work too.

Do you know how to reinstall it to work again?

Output from sudo dpkg --configure -a :

dpkg: dependency problems prevent configuration of tvbrowser:
 tvbrowser depends on sun-java6-jre | sun-java5-jre; however:
  Package sun-java6-jre is not installed.
  Package sun-java5-jre is not installed.
dpkg: error processing tvbrowser (--configure):
 dependency problems - leaving unconfigured
Errors were encountered while processing:
 tvbrowser

Output from sudo apt-get install sun-java6-jre

Reading package lists... Done
Building dependency tree       
Reading state information... Done
Package sun-java6-jre is not available, but is referred to by another package.
This may mean that the package is missing, has been obsoleted, or
is only available from another source
E: Package sun-java6-jre has no installation candidate

This pastebin has the output of find /etc/apt/ -name '*.list' -ls -exec cat {} \; > repositories.txt .

Answer 1

The standard way to repair the dpkg database is to use this command:

sudo dpkg --configure -a

Answer 2

What I am noticing from your output of the error is this:

dpkg: dependency problems prevent configuration of tvbrowser:

Try:

 sudo apt-get -f install

This should satisfy dependencies not met when you installed a .deb file in Ubuntu. It may end up asking you if it is ok to download those dependencies.

Hope this helps, if it helps.

Answer 3

The error you are getting explains what packages are missing.

Do the following in terminal, and it will fix the dependency issue:

sudo apt-get install sun-java6-jre

That should immediately fix any issues you are having.