Sudo apt-get update
と入力すると、次のようになります。
mohd-arafat-hossain@TUD:~$ Sudo apt-get update
[Sudo] password for mohd-arafat-hossain:
Ign http://bd.archive.ubuntu.com precise InRelease
Ign http://bd.archive.ubuntu.com precise-updates InRelease
Ign http://bd.archive.ubuntu.com precise-backports InRelease
Ign http://bd.archive.ubuntu.com precise Release.gpg
Ign http://bd.archive.ubuntu.com precise-updates Release.gpg
Ign http://bd.archive.ubuntu.com precise-backports Release.gpg
Ign http://bd.archive.ubuntu.com precise Release
Ign http://bd.archive.ubuntu.com precise-updates Release
Ign http://bd.archive.ubuntu.com precise-backports Release
Ign http://extras.ubuntu.com precise InRelease
Ign http://ppa.launchpad.net precise InRelease
Hit http://extras.ubuntu.com precise Release.gpg
Hit http://ppa.launchpad.net precise Release.gpg
Hit http://extras.ubuntu.com precise Release
Hit http://ppa.launchpad.net precise Release
Hit http://extras.ubuntu.com precise/main Sources
Hit http://bd.archive.ubuntu.com precise/main TranslationIndex
Hit http://ppa.launchpad.net precise/main Sources
Hit http://bd.archive.ubuntu.com precise/multiverse TranslationIndex
Hit http://bd.archive.ubuntu.com precise/restricted TranslationIndex
Hit http://extras.ubuntu.com precise/main i386 Packages
Ign http://extras.ubuntu.com precise/main TranslationIndex
Hit http://bd.archive.ubuntu.com precise/universe TranslationIndex
Hit http://ppa.launchpad.net precise/main i386 Packages
Ign http://ppa.launchpad.net precise/main TranslationIndex
Ign http://security.ubuntu.com precise-security InRelease
Hit http://security.ubuntu.com precise-security Release.gpg
Hit http://bd.archive.ubuntu.com precise-updates/main TranslationIndex
Hit http://security.ubuntu.com precise-security Release
Hit http://bd.archive.ubuntu.com precise-updates/multiverse TranslationIndex
Hit http://bd.archive.ubuntu.com precise-updates/restricted TranslationIndex
Hit http://bd.archive.ubuntu.com precise-updates/universe TranslationIndex
Hit http://security.ubuntu.com precise-security/main Sources
Ign http://extras.ubuntu.com precise/main Translation-en_US
Ign http://ppa.launchpad.net precise/main Translation-en_US
Ign http://extras.ubuntu.com precise/main Translation-en
Hit http://bd.archive.ubuntu.com precise-backports/main TranslationIndex
Hit http://bd.archive.ubuntu.com precise-backports/multiverse TranslationIndex
Hit http://bd.archive.ubuntu.com precise-backports/restricted TranslationIndex
Ign http://ppa.launchpad.net precise/main Translation-en
Hit http://bd.archive.ubuntu.com precise-backports/universe TranslationIndex
Hit http://bd.archive.ubuntu.com precise/main Translation-en
Hit http://bd.archive.ubuntu.com precise/multiverse Translation-en
Hit http://bd.archive.ubuntu.com precise/restricted Translation-en
Hit http://bd.archive.ubuntu.com precise/universe Translation-en
Hit http://security.ubuntu.com precise-security/restricted Sources
Hit http://security.ubuntu.com precise-security/universe Sources
Hit http://security.ubuntu.com precise-security/multiverse Sources
Hit http://security.ubuntu.com precise-security/main i386 Packages
Hit http://security.ubuntu.com precise-security/restricted i386 Packages
Hit http://bd.archive.ubuntu.com precise-updates/main Translation-en
Hit http://bd.archive.ubuntu.com precise-updates/multiverse Translation-en
Hit http://security.ubuntu.com precise-security/universe i386 Packages
Hit http://security.ubuntu.com precise-security/multiverse i386 Packages
Hit http://security.ubuntu.com precise-security/main TranslationIndex
Hit http://security.ubuntu.com precise-security/multiverse TranslationIndex
Hit http://security.ubuntu.com precise-security/restricted TranslationIndex
Hit http://security.ubuntu.com precise-security/universe TranslationIndex
Hit http://bd.archive.ubuntu.com precise-updates/restricted Translation-en
Hit http://bd.archive.ubuntu.com precise-updates/universe Translation-en
Hit http://security.ubuntu.com precise-security/main Translation-en
Hit http://security.ubuntu.com precise-security/multiverse Translation-en
Hit http://security.ubuntu.com precise-security/restricted Translation-en
Hit http://security.ubuntu.com precise-security/universe Translation-en
Hit http://bd.archive.ubuntu.com precise-backports/main Translation-en
Hit http://bd.archive.ubuntu.com precise-backports/multiverse Translation-en
Hit http://bd.archive.ubuntu.com precise-backports/restricted Translation-en
Hit http://bd.archive.ubuntu.com precise-backports/universe Translation-en
Err http://bd.archive.ubuntu.com precise/main Sources
404 Not Found
Err http://bd.archive.ubuntu.com precise/restricted Sources
404 Not Found
Err http://bd.archive.ubuntu.com precise/universe Sources
404 Not Found
Err http://bd.archive.ubuntu.com precise/multiverse Sources
404 Not Found
Err http://bd.archive.ubuntu.com precise/main i386 Packages
404 Not Found
Err http://bd.archive.ubuntu.com precise/restricted i386 Packages
404 Not Found
Err http://bd.archive.ubuntu.com precise/universe i386 Packages
404 Not Found
Err http://bd.archive.ubuntu.com precise/multiverse i386 Packages
404 Not Found
Err http://bd.archive.ubuntu.com precise-updates/main Sources
404 Not Found
Err http://bd.archive.ubuntu.com precise-updates/restricted Sources
404 Not Found
Err http://bd.archive.ubuntu.com precise-updates/universe Sources
404 Not Found
Err http://bd.archive.ubuntu.com precise-updates/multiverse Sources
404 Not Found
Err http://bd.archive.ubuntu.com precise-updates/main i386 Packages
404 Not Found
Err http://bd.archive.ubuntu.com precise-updates/restricted i386 Packages
404 Not Found
Err http://bd.archive.ubuntu.com precise-updates/universe i386 Packages
404 Not Found
Err http://bd.archive.ubuntu.com precise-updates/multiverse i386 Packages
404 Not Found
Err http://bd.archive.ubuntu.com precise-backports/main Sources
404 Not Found
Err http://bd.archive.ubuntu.com precise-backports/restricted Sources
404 Not Found
Err http://bd.archive.ubuntu.com precise-backports/universe Sources
404 Not Found
Err http://bd.archive.ubuntu.com precise-backports/multiverse Sources
404 Not Found
Err http://bd.archive.ubuntu.com precise-backports/main i386 Packages
404 Not Found
Err http://bd.archive.ubuntu.com precise-backports/restricted i386 Packages
404 Not Found
Err http://bd.archive.ubuntu.com precise-backports/universe i386 Packages
404 Not Found
Err http://bd.archive.ubuntu.com precise-backports/multiverse i386 Packages
404 Not Found
W: Failed to fetch http://bd.archive.ubuntu.com/ubuntu/dists/precise/main/source/Sources 404 Not Found
W: Failed to fetch http://bd.archive.ubuntu.com/ubuntu/dists/precise/restricted/source/Sources 404 Not Found
W: Failed to fetch http://bd.archive.ubuntu.com/ubuntu/dists/precise/universe/source/Sources 404 Not Found
W: Failed to fetch http://bd.archive.ubuntu.com/ubuntu/dists/precise/multiverse/source/Sources 404 Not Found
W: Failed to fetch http://bd.archive.ubuntu.com/ubuntu/dists/precise/main/binary-i386/Packages 404 Not Found
W: Failed to fetch http://bd.archive.ubuntu.com/ubuntu/dists/precise/restricted/binary-i386/Packages 404 Not Found
W: Failed to fetch http://bd.archive.ubuntu.com/ubuntu/dists/precise/universe/binary-i386/Packages 404 Not Found
W: Failed to fetch http://bd.archive.ubuntu.com/ubuntu/dists/precise/multiverse/binary-i386/Packages 404 Not Found
W: Failed to fetch http://bd.archive.ubuntu.com/ubuntu/dists/precise-updates/main/source/Sources 404 Not Found
W: Failed to fetch http://bd.archive.ubuntu.com/ubuntu/dists/precise-updates/restricted/source/Sources 404 Not Found
W: Failed to fetch http://bd.archive.ubuntu.com/ubuntu/dists/precise-updates/universe/source/Sources 404 Not Found
W: Failed to fetch http://bd.archive.ubuntu.com/ubuntu/dists/precise-updates/multiverse/source/Sources 404 Not Found
W: Failed to fetch http://bd.archive.ubuntu.com/ubuntu/dists/precise-updates/main/binary-i386/Packages 404 Not Found
W: Failed to fetch http://bd.archive.ubuntu.com/ubuntu/dists/precise-updates/restricted/binary-i386/Packages 404 Not Found
W: Failed to fetch http://bd.archive.ubuntu.com/ubuntu/dists/precise-updates/universe/binary-i386/Packages 404 Not Found
W: Failed to fetch http://bd.archive.ubuntu.com/ubuntu/dists/precise-updates/multiverse/binary-i386/Packages 404 Not Found
W: Failed to fetch http://bd.archive.ubuntu.com/ubuntu/dists/precise-backports/main/source/Sources 404 Not Found
W: Failed to fetch http://bd.archive.ubuntu.com/ubuntu/dists/precise-backports/restricted/source/Sources 404 Not Found
W: Failed to fetch http://bd.archive.ubuntu.com/ubuntu/dists/precise-backports/universe/source/Sources 404 Not Found
W: Failed to fetch http://bd.archive.ubuntu.com/ubuntu/dists/precise-backports/multiverse/source/Sources 404 Not Found
W: Failed to fetch http://bd.archive.ubuntu.com/ubuntu/dists/precise-backports/main/binary-i386/Packages 404 Not Found
W: Failed to fetch http://bd.archive.ubuntu.com/ubuntu/dists/precise-backports/restricted/binary-i386/Packages 404 Not Found
W: Failed to fetch http://bd.archive.ubuntu.com/ubuntu/dists/precise-backports/universe/binary-i386/Packages 404 Not Found
W: Failed to fetch http://bd.archive.ubuntu.com/ubuntu/dists/precise-backports/multiverse/binary-i386/Packages 404 Not Found
E: Some index files failed to download. They have been ignored, or old ones used instead.
このエラーを取得せずにこの問題を解決するにはどうすればよいですか?お願いします
Ubuntu 12.04パッケージを更新するたびに常にやろうとしていることは、最も近い/最適なミラー/サーバーからダウンロードするようにすることです。
ソフトウェアセンターを起動することから始めます。
メニューバーから[編集]を選択し、[ソフトウェアソース]を選択します。 ..
ソース: http://www.ubuntulinuxguide.com/Sudo-apt-get-update-error-slow-mirror-ubuntu-12-04/
https://launchpad.net/ubuntu/+mirror/mirrors.ispros.com.bd-archive を見ると、バングラデシュのミラーはPreciseパッケージでまだ更新されていないようです。 近くの別のミラーを選択する (インドが思い浮かぶ)またはバグを報告することをお勧めします。
あなたが持っているエラーは、リンクが実際に削除されたためです。これは一時的なものであるか、サーバーが正常に動作していないか、メンテナンス中の可能性があります(この場合、パッケージファイルはサーバーにアップロードされていません)
これを解決するには、ダウンロードソースを変更してみてください(サーバーによって機能する場合と機能しない場合があります)
open software sources
ubuntu software
タブをクリックします
次にDownload from
でその他を選択し、select best server
をクリックします
その後、ソフトウェアソースが自動的に更新されます。