Unable to repair packages in Ubuntu Software Center

Question

When I open up the Software Center it gives me, "Items cannot be installed or removed until package catalog is repaired". Can someone help me?

Solution

Open a terminal and use these commands

sudo apt-get install -f

sudo dpkg --configure -a

sudo apt-get update && sudo apt-get upgrade

After the last one you should be able to open your USC again without faults.

Edit

Comments explain that key 5A9A06AEF9CB8DB0 is missing, during sudo apt-get update this fault comes up:

W: GPG error: http://ppa.launchpad.net oneiric Release: The following signatures couldn't be verified because the public key is not available: NO_PUBKEY 5A9A06AEF9CB8DB0

To repair the key these commands can be used:

sudo gpg --keyserver keyserver.ubuntu.com --recv-keys 5A9A06AEF9CB8DB0
sudo gpg --export --armor 5A9A06AEF9CB8DB0 | sudo apt-key add -

After that sudo apt-get update should work, if you get no faults on it you can open USC again and click on the repair button.

Comments

[Nitin Venkatesh]

did you try sudo apt-get update from the terminal before installing applications from the Ubuntu Software Center

[lieudusty]

Still doesn't work. It gives me the same error in USC

[lieudusty]

On sudo apt-get update I got: inline W: GPG error: http://ppa.launchpad.net oneiric Release: The following signatures couldn't be verified because the public key is not available: NO_PUBKEY 5A9A06AEF9CB8DB0,

[Bruno Pereira]

sudo apt-key adv --keyserver keyserver.ubuntu.com --recv-keys followed by sudo apt-key adv --keyserver keyserver.ubuntu.com --recv-keys 5A9A06AEF9CB8DB0 will do it for you I think (you have to type the 2 commands not only the last).

[lieudusty]

I did that and i still get the same error in USC.

[Bruno Pereira]

got any output there? (faults?)

[Bruno Pereira]

Do a sudo apt-get update again to check for the same fault plz and if that fault is still there do: sudo gpg --keyserver keyserver.ubuntu.com --recv-keys 5A9A06AEF9CB8DB0 followed by a sudo gpg --export --armor 5A9A06AEF9CB8DB0 | sudo apt-key add -

[lieudusty]

I had no faults when running the command sudo gpg --keyserver keyserver.ubuntu.com --recv-keys 5A9A06AEF9CB8DB0, and sudo gpg --export --armor 5A9A06AEF9CB8DB0 | sudo apt-key add -,

[Bruno Pereira]

then try just a sudo apt-get update again and check for faults.

[lieudusty]

I ran sudo apt-get update and got no faults at all.

[Bruno Pereira]

USC should open. else force and upgrade with ` sudo apt-get update && sudo apt-get upgrade`.

[lieudusty]

After I opened it it still gives me the same error. Items cannot be install or removed until the package catalog is repaired EDIT: Now when i clicked repair it fixes it. Thank you very much! =D

[Bruno Pereira]

welcome, glad it worked. ill edit the answer to reflect all this info!

[Bruno Pereira]

done, tick the "checked" box if you agree with the answer. regards