How to fix “w: some index files failed to download

nazar-desctop:/etc/apt$ mèo source.listdeb http://security.ubuntu.com/ubuntu precise-security main universenazar_art


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nazar-desctop:/etc/apt$ mèo sources.danh mục.olddeb http://archive sầu.ubuntu.com/ubuntu precise universenazar_art


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nazar-desctop:/etc/apt$ cat source.listdeb http://security.ubuntu.com/ubuntu precise-security main universenazar_art


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nazar-desctop:/etc/apt$ I updated according to this post How bởi vì I restore the default repositories?

But It called another problem when I run suvì apt-get update I have some output lượt thích this:

Err http://ua.archive.ubuntu.com main/restricted Sources 404 Not Found Err http://ua.archive sầu.ubuntu.com main/universe Sources 404 Not Found Err http://ua.archive sầu.ubuntu.com main/multiverse Sources 404 Not Found Err http://ua.archive sầu.ubuntu.com main/restricted amd64 Packages 404 Not Found Err http://ua.archive sầu.ubuntu.com main/universe amd64 Packages 404 Not Found & this:

W: Failed to fetch http://ua.archive sầu.ubuntu.com/ubuntu/dists/-backports/restricted/binary-i386/Packages 404 Not Found W: Failed to fetch http://ua.archive.ubuntu.com/ubuntu/dists/-backports/universe/binary-i386/Packages 404 Not Found W: Failed khổng lồ fetch http://ua.archive sầu.ubuntu.com/ubuntu/dists/-backports/multiverse/binary-i386/Packages 404 Not Found E: Some index files failed to tải về. They have sầu been ignored, or old ones used instead.UPDATE:

I did this comm& (Thanks NikTh):

find /etc/apt -name "*.list" -exec bash -c "emang đến -e " $1 "; cat -n "$1"" _ "" ;

whole output:

/etc/apt/sources.menu 1 ############################################################# 2 ################### OFFICIAL UBUNTU REPOS ################### 3 ############################################################# 4 5 ###### Ubuntu Main Repos 6 deb http://ua.archive sầu.ubuntu.com/ubuntu/ main restricted universe multiverse 7 deb-src http://ua.archive sầu.ubuntu.com/ubuntu/ main restricted universe multiverse 8 9 ###### Ubuntu Update Repos 10 deb http://ua.archive sầu.ubuntu.com/ubuntu/ -security main restricted universe multiverse 11 deb http://ua.archive.ubuntu.com/ubuntu/ -updates main restricted universe multiverse 12 deb http://ua.archive sầu.ubuntu.com/ubuntu/ -proposed main restricted universe multiverse 13 deb http://ua.archive.ubuntu.com/ubuntu/ -backports main restricted universe multiverse 14 deb-src http://ua.archive.ubuntu.com/ubuntu/ -security main restricted universe multiverse 15 deb-src http://ua.archive.ubuntu.com/ubuntu/ -updates main restricted universe multiverse 16 deb-src http://ua.archive.ubuntu.com/ubuntu/ -proposed main restricted universe multiverse 17 deb-src http://ua.archive sầu.ubuntu.com/ubuntu/ -backports main restricted universe multiverse 18 19 20 21 ############################################################# 22 ################### OFFICIAL UBUNTU REPOS ################### 23 ############################################################# 24 25 ###### Ubuntu Main Repos 26 deb http://ua.archive.ubuntu.com/ubuntu/ main restricted universe multiverse 27 deb-src http://ua.archive sầu.ubuntu.com/ubuntu/ main restricted universe multiverse 28 29 ###### Ubuntu Update Repos 30 deb http://ua.archive sầu.ubuntu.com/ubuntu/ -security main restricted universe multiverse 31 deb http://ua.archive sầu.ubuntu.com/ubuntu/ -updates main restricted universe multiverse 32 deb http://ua.archive sầu.ubuntu.com/ubuntu/ -proposed main restricted universe multiverse 33 deb http://ua.archive.ubuntu.com/ubuntu/ -backports main restricted universe multiverse 34 deb-src http://ua.archive.ubuntu.com/ubuntu/ -security main restricted universe multiverse 35 deb-src http://ua.archive.ubuntu.com/ubuntu/ -updates main restricted universe multiverse 36 deb-src http://ua.archive sầu.ubuntu.com/ubuntu/ -proposed main restricted universe multiverse 37 deb-src http://ua.archive sầu.ubuntu.com/ubuntu/ -backports main restricted universe multiverse 38 39 /etc/apt/source.các mục 1 deb http://security.ubuntu.com/ubuntu precise-security main universe/etc/apt/sources.danh mục.d/ubuntu-extras.danh sách 1 deb http://extras.ubuntu.com/ubuntu/ precise main #Added by software-center 2 deb-src http://extras.ubuntu.com/ubuntu/ precise main #Added by software-center/etc/apt/sources.các mục.d/webupd8team-y-ppa-manager-precise.menu 1 deb http://ppa.launchpad.net/webupd8team/y-ppa-manager/ubuntu precise main 2 deb-src http://ppa.launchpad.net/webupd8team/y-ppa-manager/ubuntu precise main/etc/apt/sources.list.d/playonlinux.danh mục 1 deb http://deb.playonlinux.com/ quantal main/etc/apt/sources.các mục.d/private-ppage authority.launchpad.net_commercial-ppa-uploaders_intellij-idea-ce_ubuntu.list 1 deb https://private-ppa.launchpad.net/commercial-ppa-uploaders/intellij-idea-ce/ubuntu precise main #Added by software-center; credentials stored in /etc/apt/auth.conf/etc/apt/sources.các mục.d/webupd8team-sublime-text-3-precise.danh mục 1 deb http://ppage authority.launchpad.net/webupd8team/sublime-text-3/ubuntu precise main 2 deb-src http://ppage authority.launchpad.net/webupd8team/sublime-text-3/ubuntu precise main/etc/apt/sources.danh sách.d/medibuntu.menu 1 ## Please report any bug on https://bugs.launchpad.net/medibuntu/ 2 deb http://packages.medibuntu.org/ precise miễn phí non-không lấy phí #Medibuntu - Ubuntu 12.04 "precise pangolin" 3 # deb-src http://packages.medibuntu.org/ precise free non-không tính tiền #Medibuntu (source) - Ubuntu 12.04 "precise pangolin"/etc/apt/sources.danh mục.d/lezhoev-qstamina-precise.các mục 1 deb http://ppa.launchpad.net/lezhoev/qstamina/ubuntu precise main 2 deb-src http://ppage authority.launchpad.net/lezhoev/qstamina/ubuntu precise main/etc/apt/sources.danh sách.d/webupd8team-java-precise.danh sách 1 deb http://ppage authority.launchpad.net/webupd8team/java/ubuntu precise main 2 deb-src http://ppa.launchpad.net/webupd8team/java/ubuntu precise main/etc/apt/sources.danh mục.d/tualatrix-ppa-precise.menu 1 deb http://ppage authority.launchpad.net/tualatrix/ppa/ubuntu precise main 2 deb-src http://ppage authority.launchpad.net/tualatrix/ppa/ubuntu precise main/etc/apt/sources.menu.d/kilian-f_lux-precise.các mục 1 deb http://ppa.launchpad.net/kilian/f.lux/ubuntu precise main 2 deb-src http://ppa.launchpad.net/kilian/f.lux/ubuntu precise main/etc/apt/sources.danh mục.d/ubuntu-wine-ppa-precise.danh sách 1 deb http://ppa.launchpad.net/ubuntu-wine/ppa/ubuntu precise main 2 deb-src http://ppage authority.launchpad.net/ubuntu-wine/ppa/ubuntu precise main/etc/apt/sources.danh mục.d/fsqcds-goldendict-precise.list 1 deb http://ppage authority.launchpad.net/fsqcds/goldendict/ubuntu precise main 2 deb-src http://ppa.launchpad.net/fsqcds/goldendict/ubuntu precise main/etc/apt/sources.danh sách.d/webupd8team-rhythmbox-precise.danh mục 1 deb http://ppage authority.launchpad.net/webupd8team/rhythmbox/ubuntu precise main 2 deb-src http://ppa.launchpad.net/webupd8team/rhythmbox/ubuntu precise main/etc/apt/sources.danh sách.d/upubuntu-com-devel-precise.menu 1 deb http://ppa.launchpad.net/upubuntu-com/devel/ubuntu precise main 2 deb-src http://ppage authority.launchpad.net/upubuntu-com/devel/ubuntu precise main

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