[Bug 1307040] Re: Duplicated entries in /etc/apt/sources.list immediately after clean install

[Marcus Tomlinson]

This release of Ubuntu is no longer receiving maintenance updates. If
this is still an issue on a maintained version of Ubuntu please let us
know.

** Changed in: ubiquity (Ubuntu)
       Status: Confirmed => Incomplete

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Title:
  Duplicated entries in /etc/apt/sources.list immediately after clean
  install

Status in ubiquity package in Ubuntu:
  Incomplete

Bug description:
  After a fresh install (in a Virtualbox VM), with "download updates" and "3rd party software" both checked,
  the first "apt-get update" prints the following warnings:

  ...
  Reading package lists... Done
  W: Duplicate sources.list entry http://security.ubuntu.com/ubuntu/ trusty-security/main amd64 Packages (/var/lib/apt/lists/security.ubuntu.com_ubuntu_dists_trusty-security_main_binary-amd64_Packages)
  W: Duplicate sources.list entry http://security.ubuntu.com/ubuntu/ trusty-security/restricted amd64 Packages (/var/lib/apt/lists/security.ubuntu.com_ubuntu_dists_trusty-security_restricted_binary-amd64_Packages)
  W: Duplicate sources.list entry http://security.ubuntu.com/ubuntu/ trusty-security/main i386 Packages (/var/lib/apt/lists/security.ubuntu.com_ubuntu_dists_trusty-security_main_binary-i386_Packages)
  W: Duplicate sources.list entry http://security.ubuntu.com/ubuntu/ trusty-security/restricted i386 Packages (/var/lib/apt/lists/security.ubuntu.com_ubuntu_dists_trusty-security_restricted_binary-i386_Packages)
  W: You may want to run apt-get update to correct these problems
  t at t-VirtualBox:~$ /trusty-security^C
  t at t-VirtualBox:~$ dpkg-query -S /etc/apt/sources.list
  dpkg-query: no path found matching pattern /etc/apt/sources.list

  I will attach my /etc/apt/sources.list file

  ProblemType: Bug
  DistroRelease: Ubuntu 14.04
  Package: ubiquity (not installed)
  ProcVersionSignature: Ubuntu 3.13.0-19.40-generic 3.13.6
  Uname: Linux 3.13.0-19-generic x86_64
  ApportVersion: 2.13.3-0ubuntu1
  Architecture: amd64
  Date: Sat Apr 12 16:47:53 2014
  InstallCmdLine: file=/cdrom/preseed/ubuntu.seed boot=casper initrd=/casper/initrd.lz quiet splash -- maybe-ubiquity
  InstallationDate: Installed on 2014-04-12 (0 days ago)
  InstallationMedia: Ubuntu 14.04 LTS "Trusty Tahr" - Beta amd64 (20140326)
  ProcEnviron:
   TERM=xterm
   PATH=(custom, no user)
   XDG_RUNTIME_DIR=<set>
   LANG=en_US.UTF-8
   SHELL=/bin/bash
  SourcePackage: ubiquity
  UpgradeStatus: No upgrade log present (probably fresh install)

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