Problem Description:

Each time i try to download the updates for my operating system (Ubuntu 12.04) i get the following list of error messages:

W:Failed to fetch http://extras.ubuntu.com/ubuntu/dists/precise/Release.gpg  Something wicked happened resolving 'extras.ubuntu.com:http' (-5 - No address associated with hostname)

, W:Failed to fetch http://ppa.launchpad.net/deluge-team/ppa/ubuntu/dists/precise/Release.gpg  Something wicked happened resolving 'ppa.launchpad.net:http' (-5 - No address associated with hostname)

, W:Failed to fetch http://packages.medibuntu.org/dists/precise/Release.gpg  Something wicked happened resolving 'packages.medibuntu.org:http' (-5 - No address associated with hostname)

, W:Failed to fetch http://archive.canonical.com/ubuntu/dists/precise/Release.gpg  Something wicked happened resolving 'archive.canonical.com:http' (-5 - No address associated with hostname)

, W:Failed to fetch http://ppa.launchpad.net/tualatrix/ppa/ubuntu/dists/precise/Release.gpg  Something wicked happened resolving 'ppa.launchpad.net:http' (-5 - No address associated with hostname)

, E:Some index files failed to download. They have been ignored, or old ones used instead.

The Contents of (/etc/apt/sources.list) File:

# deb cdrom:[Ubuntu 12.04 LTS _Precise Pangolin_ - Release i386 (20120423)]/ precise main restricted



# See http://help.ubuntu.com/community/UpgradeNotes for how to upgrade to

# newer versions of the distribution.

deb http://archive.ubuntu.com/ubuntu precise main restricted

deb-src http://archive.ubuntu.com/ubuntu precise main restricted



## Major bug fix updates produced after the final release of the

## distribution.

deb http://archive.ubuntu.com/ubuntu precise-updates main restricted

deb-src http://archive.ubuntu.com/ubuntu precise-updates main restricted



## N.B. software from this repository is ENTIRELY UNSUPPORTED by the Ubuntu

## team. Also, please note that software in universe WILL NOT receive any

## review or updates from the Ubuntu security team.

deb http://archive.ubuntu.com/ubuntu precise universe

deb-src http://archive.ubuntu.com/ubuntu precise universe

deb http://archive.ubuntu.com/ubuntu precise-updates universe

deb-src http://archive.ubuntu.com/ubuntu precise-updates universe



## N.B. software from this repository is ENTIRELY UNSUPPORTED by the Ubuntu 

## team, and may not be under a free licence. Please satisfy yourself as to 

## your rights to use the software. Also, please note that software in 

## multiverse WILL NOT receive any review or updates from the Ubuntu

## security team.

deb http://archive.ubuntu.com/ubuntu precise multiverse

deb-src http://archive.ubuntu.com/ubuntu precise multiverse

deb http://archive.ubuntu.com/ubuntu precise-updates multiverse

deb-src http://archive.ubuntu.com/ubuntu precise-updates multiverse



## N.B. software from this repository may not have been tested as

## extensively as that contained in the main release, although it includes

## newer versions of some applications which may provide useful features.

## Also, please note that software in backports WILL NOT receive any review

## or updates from the Ubuntu security team.



deb http://archive.ubuntu.com/ubuntu precise-security main restricted

deb-src http://archive.ubuntu.com/ubuntu precise-security main restricted

deb http://archive.ubuntu.com/ubuntu precise-security universe

deb-src http://archive.ubuntu.com/ubuntu precise-security universe

deb http://archive.ubuntu.com/ubuntu precise-security multiverse

deb-src http://archive.ubuntu.com/ubuntu precise-security multiverse



## Uncomment the following two lines to add software from Canonical's

## 'partner' repository.

## This software is not part of Ubuntu, but is offered by Canonical and the

## respective vendors as a service to Ubuntu users.

deb http://archive.canonical.com/ubuntu precise partner

# deb-src http://archive.canonical.com/ubuntu precise partner



## This software is not part of Ubuntu, but is offered by third-party

## developers who want to ship their latest software.

deb http://extras.ubuntu.com/ubuntu precise main

# deb-src http://extras.ubuntu.com/ubuntu precise main

The Files inside of (/etc/apt/sources.list.d) directory:

-rw-r--r-- 1 root root 136 Oct 10 16:30 deluge-team-ppa-precise.list    

-rw-r--r-- 1 root root 136 Oct 10 16:30 deluge-team-ppa-precise.list.save         

-rw-r--r-- 1 root root 285 Oct 10 16:30 medibuntu.list        

-rw-r--r-- 1 root root 285 Oct 10 16:30 medibuntu.list.save          

-rw-r--r-- 1 root root 132 Oct 10 16:30 tualatrix-ppa-precise.list         

-rw-r--r-- 1 root root 134 Oct 10 16:30 tualatrix-ppa-precise.list.save          

-rw-r--r-- 1 root root 148 Oct 10 16:30 yannubuntu-boot-repair-precise.list       

-rw-r--r-- 1 root root 148 Oct 10 16:30 yannubuntu-boot-repair-precise.list.save  

Related Links to this Post on AskUbuntu.com:

Server error (-5 - No address associated with hostname)

How to fix "-5 No address associated with hostname error" while updating?

I have tried to research online for ways to solve the issue but i failed to figure out the real reason why i am getting those errors. Any suggestions, ideas or solutions that might aid me to solve this issue are greatly appreciated.