W: Duplicate sources.list entry http://archive.ubuntu.com/ubuntu/ natty/restricted i386 Packages (/var/lib/apt/lists/archive.ubuntu.com_ubuntu_dists_natty_restricted_binary-i386_Packages)
W: Duplicate sources.list entry http://archive.ubuntu.com/ubuntu/ natty-updates/restricted i386 Packages (/var/lib/apt/lists/archive.ubuntu.com_ubuntu_dists_natty-updates_restricted_binary-i386_Packages)
W: Duplicate sources.list entry http://extras.ubuntu.com/ubuntu/ natty/main i386 Packages (/var/lib/apt/lists/extras.ubuntu.com_ubuntu_dists_natty_main_binary-i386_Packages)
W: You may want to run apt-get update to correct these problems