Ask Ubuntu is a question and answer site for Ubuntu users and developers. Join them; it only takes a minute:

Sign up
Here's how it works:
  1. Anybody can ask a question
  2. Anybody can answer
  3. The best answers are voted up and rise to the top

I am trying to install the necessary plug-ins to play a video but I always get the "broken packages" message.

After searching on Ask Ubuntu I've already performed the sudo apt-get autoclean and sudo apt-get update commands, but they won't work and when using sudo apt-get -f install, this is what I get:

1 upgraded, 0 newly installed, 0 to remove and 6 not upgraded.
1 not fully installed or removed.
Need to get 0 B/67.9 kB of archives.
After this operation, 1,024 B of additional disk space will be used.
Do you want to continue [Y/n]? y
(Reading database ... 179332 files and directories currently installed.)
Preparing to replace libdjvulibre-text 3.5.24-9 (using .../libdjvulibre-text_3.5.24-9ubuntu0.1_amd64.deb) ...
Unpacking replacement libdjvulibre-text ...
dpkg: error processing /var/cache/apt/archives/libdjvulibre-text_3.5.24-9ubuntu0.1_amd64.deb (--unpack):
 unable to create `/usr/share/djvu/osi/en/messages.xml.dpkg-new' (while processing `./usr/share/djvu/osi/en/messages.xml'): Input/output error
Errors were encountered while processing:
E: Sub-process /usr/bin/dpkg returned an error code (1)

any help?

share|improve this question
how do I make the backup? I can't install anything since I get the same message – Camila Dec 20 '13 at 2:19

Check your sources file to make sure you haven't added anything that is illegitimate. To edit your sources:

sudo vim /etc/apt/sources.list 


sudo nano /etc/apt/sources.list 

if you perfer nano. You can use this website to generate your sources file if you want, I've used it before:

Once you are sure your sources file is good, then run this command:

sudo apt-get update

That will update all of your software sources. Now upgrade your system:

sudo apt-get upgrade

If you are still getting broken dependencies, then you are probably trying to install a package that needs another package that isn't in your repositories.

share|improve this answer

Your Answer


By posting your answer, you agree to the privacy policy and terms of service.

Not the answer you're looking for? Browse other questions tagged or ask your own question.