Error :- W: Duplicate sources.list entry
http://download.virtualbox.org/virtualbox/debian/ precise/contrib i386
Packages
(/var/lib/apt/lists/download.virtualbox.org_virtualbox_debian_dists_precise_contrib_binary-i386_Packages)Open Terminal Type
Step1:- su (logging into Root)
Step2:- sudo gedit /etc/sources.list
Step3:- Remove the Virtualbox in Red Colour as Shown Below Image
Step4:- Save it and Exit.
See http://help.ubuntu.com/community/UpgradeNotes for how to upgrade to
# newer versions of the distribution.
deb http://us.archive.ubuntu.com/ubuntu/ precise main restricted
#Addedby software-properties
deb-src http://us.archive.ubuntu.com/ubuntu/ precise restricted main multiverse universe
## Major bug fix updates produced after the final release of the
## distribution.
deb http://us.archive.ubuntu.com/ubuntu/ precise-updates main restricted
#Addedby software-properties
deb-src http://us.archive.ubuntu.com/ubuntu/ precise-updates restricted main multiverse universe
## 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://us.archive.ubuntu.com/ubuntu/ precise universe
deb http://us.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://us.archive.ubuntu.com/ubuntu/ precise multiverse
deb http://us.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://us.archive.ubuntu.com/ubuntu/ precise-backports main restricted universe multiverse
#Addedby software-properties
deb-src http://us.archive.ubuntu.com/ubuntu/ precise-backports main restricted universe multiverse
deb http://security.ubuntu.com/ubuntu/ precise-security main restricted
#Addedby software-properties
deb-src http://security.ubuntu.com/ubuntu/ precise-security restricted main multiverse universe
deb http://security.ubuntu.com/ubuntu/ precise-security universe
deb http://security.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
# deb http://download.virtualbox.org/virtualbox/debian/ precise contrib
Step5:- sudo apt-get update
Hope U Like it......
Thanking You
