W: Duplicate sources.list entry
http://archive.ubuntu.com/ubuntu/ saucy/main amd64 Packages (/var/lib/apt/lists/archive.ubuntu.com_ubuntu_dists_saucy_main_binary-amd64_Packages)
W: Duplicate sources.list entry
http://archive.ubuntu.com/ubuntu/ saucy/restricted amd64 Packages (/var/lib/apt/lists/archive.ubuntu.com_ubuntu_dists_saucy_restricted_binary-amd64_Packages)
W: Duplicate sources.list entry
http://archive.ubuntu.com/ubuntu/ saucy/universe amd64 Packages (/var/lib/apt/lists/archive.ubuntu.com_ubuntu_dists_saucy_universe_binary-amd64_Packages)
W: Duplicate sources.list entry
http://archive.ubuntu.com/ubuntu/ saucy/multiverse amd64 Packages (/var/lib/apt/lists/archive.ubuntu.com_ubuntu_dists_saucy_multiverse_binary-amd64_Packages)
W: Duplicate sources.list entry
http://archive.ubuntu.com/ubuntu/ saucy/main amd64 Packages (/var/lib/apt/lists/archive.ubuntu.com_ubuntu_dists_saucy_main_binary-amd64_Packages)
W: Duplicate sources.list entry
http://archive.ubuntu.com/ubuntu/ saucy/restricted amd64 Packages (/var/lib/apt/lists/archive.ubuntu.com_ubuntu_dists_saucy_restricted_binary-amd64_Packages)
W: Duplicate sources.list entry
http://archive.ubuntu.com/ubuntu/ saucy/universe amd64 Packages (/var/lib/apt/lists/archive.ubuntu.com_ubuntu_dists_saucy_universe_binary-amd64_Packages)
W: Duplicate sources.list entry
http://archive.ubuntu.com/ubuntu/ saucy/multiverse amd64 Packages (/var/lib/apt/lists/archive.ubuntu.com_ubuntu_dists_saucy_multiverse_binary-amd64_Packages)
W: Duplicate sources.list entry
http://archive.ubuntu.com/ubuntu/ saucy/main i386 Packages (/var/lib/apt/lists/archive.ubuntu.com_ubuntu_dists_saucy_main_binary-i386_Packages)
W: Duplicate sources.list entry
http://archive.ubuntu.com/ubuntu/ saucy/restricted i386 Packages (/var/lib/apt/lists/archive.ubuntu.com_ubuntu_dists_saucy_restricted_binary-i386_Packages)
W: Duplicate sources.list entry
http://archive.ubuntu.com/ubuntu/ saucy/universe i386 Packages (/var/lib/apt/lists/archive.ubuntu.com_ubuntu_dists_saucy_universe_binary-i386_Packages)
W: Duplicate sources.list entry
http://archive.ubuntu.com/ubuntu/ saucy/multiverse i386 Packages (/var/lib/apt/lists/archive.ubuntu.com_ubuntu_dists_saucy_multiverse_binary-i386_Packages)
W: Duplicate sources.list entry
http://archive.ubuntu.com/ubuntu/ saucy/main i386 Packages (/var/lib/apt/lists/archive.ubuntu.com_ubuntu_dists_saucy_main_binary-i386_Packages)
W: Duplicate sources.list entry
http://archive.ubuntu.com/ubuntu/ saucy/restricted i386 Packages (/var/lib/apt/lists/archive.ubuntu.com_ubuntu_dists_saucy_restricted_binary-i386_Packages)
W: Duplicate sources.list entry
http://archive.ubuntu.com/ubuntu/ saucy/universe i386 Packages (/var/lib/apt/lists/archive.ubuntu.com_ubuntu_dists_saucy_universe_binary-i386_Packages)
W: Duplicate sources.list entry
http://archive.ubuntu.com/ubuntu/ saucy/multiverse i386 Packages (/var/lib/apt/lists/archive.ubuntu.com_ubuntu_dists_saucy_multiverse_binary-i386_Packages)
W: Duplicate sources.list entry
http://dl.google.com/linux/chrome/deb/ stable/main amd64 Packages (/var/lib/apt/lists/dl.google.com_linux_chrome_deb_dists_stable_main_binary-amd64_Packages)
W: Duplicate sources.list entry
http://dl.google.com/linux/chrome/deb/ stable/main i386 Packages (/var/lib/apt/lists/dl.google.com_linux_chrome_deb_dists_stable_main_binary-i386_Packages)
W: Você terá que executar apt-get update para corrigir estes problemas
como faço para corrigir esse erro?