xubuntuの32bitを用いているのですが、$ sudo apt-get update
を使用すると以下のようなエラーが出ます。
Ign http://dl.google.com stable InRelease
Hit http://dl.google.com stable Release.gpg                                   
Hit http://dl.google.com stable Release                                       
Hit http://dl.google.com stable/main i386 Packages                             
Ign http://jp.archive.ubuntu.com saucy InRelease                               
Ign http://jp.archive.ubuntu.com saucy-updates InRelease                       
Ign http://jp.archive.ubuntu.com saucy-backports InRelease                     
Ign http://jp.archive.ubuntu.com saucy Release.gpg                             
Ign http://jp.archive.ubuntu.com saucy-updates Release.gpg                     
Ign http://jp.archive.ubuntu.com saucy-backports Release.gpg                   
Ign http://jp.archive.ubuntu.com saucy Release                                 
Ign http://jp.archive.ubuntu.com saucy-updates Release                         
Ign http://jp.archive.ubuntu.com saucy-backports Release                       
Ign http://security.ubuntu.com saucy-security InRelease                       
Ign http://extras.ubuntu.com saucy InRelease                                   
Ign http://dl.google.com stable/main Translation-en_US               
Ign http://dl.google.com stable/main Translation-en                 
Ign http://security.ubuntu.com saucy-security Release.gpg           
Hit http://extras.ubuntu.com saucy Release.gpg                       
Ign http://security.ubuntu.com saucy-security Release
Hit http://extras.ubuntu.com saucy Release     
Hit http://extras.ubuntu.com saucy/main Sources                       
Hit http://extras.ubuntu.com saucy/main i386 Packages
Ign http://extras.ubuntu.com saucy/main Translation-en_US           
Ign http://extras.ubuntu.com saucy/main Translation-en               
Err http://jp.archive.ubuntu.com saucy/main Sources
  404  Not Found
Err http://jp.archive.ubuntu.com saucy/restricted Sources
  404  Not Found
Err http://jp.archive.ubuntu.com saucy/universe Sources
  404  Not Found
Err http://jp.archive.ubuntu.com saucy/multiverse Sources
  404  Not Found
Err http://jp.archive.ubuntu.com saucy/main i386 Packages
  404  Not Found
Err http://jp.archive.ubuntu.com saucy/restricted i386 Packages
  404  Not Found
Err http://jp.archive.ubuntu.com saucy/universe i386 Packages
  404  Not Found
Err http://jp.archive.ubuntu.com saucy/multiverse i386 Packages
  404  Not Found
Ign http://jp.archive.ubuntu.com saucy/main Translation-en_US
Ign http://jp.archive.ubuntu.com saucy/main Translation-en
Ign http://jp.archive.ubuntu.com saucy/multiverse Translation-en_US
Ign http://jp.archive.ubuntu.com saucy/multiverse Translation-en
Ign http://jp.archive.ubuntu.com saucy/restricted Translation-en_US
Ign http://jp.archive.ubuntu.com saucy/restricted Translation-en
Ign http://jp.archive.ubuntu.com saucy/universe Translation-en_US
Ign http://jp.archive.ubuntu.com saucy/universe Translation-en
Err http://jp.archive.ubuntu.com saucy-updates/main Sources
  404  Not Found
Err http://jp.archive.ubuntu.com saucy-updates/restricted Sources
  404  Not Found
Err http://jp.archive.ubuntu.com saucy-updates/universe Sources
  404  Not Found
Err http://jp.archive.ubuntu.com saucy-updates/multiverse Sources
  404  Not Found
Err http://jp.archive.ubuntu.com saucy-updates/main i386 Packages
  404  Not Found
Err http://jp.archive.ubuntu.com saucy-updates/restricted i386 Packages
  404  Not Found
Err http://jp.archive.ubuntu.com saucy-updates/universe i386 Packages
  404  Not Found
Err http://jp.archive.ubuntu.com saucy-updates/multiverse i386 Packages
  404  Not Found
Ign http://jp.archive.ubuntu.com saucy-updates/main Translation-en_US
Ign http://jp.archive.ubuntu.com saucy-updates/main Translation-en
Ign http://jp.archive.ubuntu.com saucy-updates/multiverse Translation-en_US
Ign http://jp.archive.ubuntu.com saucy-updates/multiverse Translation-en
Ign http://jp.archive.ubuntu.com saucy-updates/restricted Translation-en_US
Ign http://jp.archive.ubuntu.com saucy-updates/restricted Translation-en
Ign http://jp.archive.ubuntu.com saucy-updates/universe Translation-en_US
Ign http://jp.archive.ubuntu.com saucy-updates/universe Translation-en
Err http://jp.archive.ubuntu.com saucy-backports/main Sources
  404  Not Found
Err http://jp.archive.ubuntu.com saucy-backports/restricted Sources
  404  Not Found
Err http://jp.archive.ubuntu.com saucy-backports/universe Sources
  404  Not Found
Err http://jp.archive.ubuntu.com saucy-backports/multiverse Sources
  404  Not Found
Err http://jp.archive.ubuntu.com saucy-backports/main i386 Packages
  404  Not Found
Err http://jp.archive.ubuntu.com saucy-backports/restricted i386 Packages
  404  Not Found
Err http://jp.archive.ubuntu.com saucy-backports/universe i386 Packages
  404  Not Found
Err http://jp.archive.ubuntu.com saucy-backports/multiverse i386 Packages
  404  Not Found
Ign http://jp.archive.ubuntu.com saucy-backports/main Translation-en_US
Ign http://jp.archive.ubuntu.com saucy-backports/main Translation-en
Ign http://jp.archive.ubuntu.com saucy-backports/multiverse Translation-en_US
Ign http://jp.archive.ubuntu.com saucy-backports/multiverse Translation-en
Ign http://jp.archive.ubuntu.com saucy-backports/restricted Translation-en_US
Ign http://jp.archive.ubuntu.com saucy-backports/restricted Translation-en
Ign http://jp.archive.ubuntu.com saucy-backports/universe Translation-en_US
Ign http://jp.archive.ubuntu.com saucy-backports/universe Translation-en
Err http://security.ubuntu.com saucy-security/main Sources
  404  Not Found [IP: 91.189.88.149 80]
Err http://security.ubuntu.com saucy-security/restricted Sources
  404  Not Found [IP: 91.189.88.149 80]
Err http://security.ubuntu.com saucy-security/universe Sources
  404  Not Found [IP: 91.189.88.149 80]
Err http://security.ubuntu.com saucy-security/multiverse Sources
  404  Not Found [IP: 91.189.88.149 80]
Err http://security.ubuntu.com saucy-security/main i386 Packages
  404  Not Found [IP: 91.189.88.149 80]
Err http://security.ubuntu.com saucy-security/restricted i386 Packages
  404  Not Found [IP: 91.189.88.149 80]
Err http://security.ubuntu.com saucy-security/universe i386 Packages
  404  Not Found [IP: 91.189.88.149 80]
Err http://security.ubuntu.com saucy-security/multiverse i386 Packages
  404  Not Found [IP: 91.189.88.149 80]
Ign http://security.ubuntu.com saucy-security/main Translation-en_US
Ign http://security.ubuntu.com saucy-security/main Translation-en
Ign http://security.ubuntu.com saucy-security/multiverse Translation-en_US
Ign http://security.ubuntu.com saucy-security/multiverse Translation-en
Ign http://security.ubuntu.com saucy-security/restricted Translation-en_US
Ign http://security.ubuntu.com saucy-security/restricted Translation-en
Ign http://security.ubuntu.com saucy-security/universe Translation-en_US
Ign http://security.ubuntu.com saucy-security/universe Translation-en
W: Failed to fetch http://jp.archive.ubuntu.com/ubuntu/dists/saucy/main/source/Sources  404  Not Found

W: Failed to fetch http://jp.archive.ubuntu.com/ubuntu/dists/saucy/restricted/source/Sources  404  Not Found

W: Failed to fetch http://jp.archive.ubuntu.com/ubuntu/dists/saucy/universe/source/Sources  404  Not Found

W: Failed to fetch http://jp.archive.ubuntu.com/ubuntu/dists/saucy/multiverse/source/Sources  404  Not Found

W: Failed to fetch http://jp.archive.ubuntu.com/ubuntu/dists/saucy/main/binary-i386/Packages  404  Not Found

W: Failed to fetch http://jp.archive.ubuntu.com/ubuntu/dists/saucy/restricted/binary-i386/Packages  404  Not Found

W: Failed to fetch http://jp.archive.ubuntu.com/ubuntu/dists/saucy/universe/binary-i386/Packages  404  Not Found

W: Failed to fetch http://jp.archive.ubuntu.com/ubuntu/dists/saucy/multiverse/binary-i386/Packages  404  Not Found

W: Failed to fetch http://jp.archive.ubuntu.com/ubuntu/dists/saucy-updates/main/source/Sources  404  Not Found

W: Failed to fetch http://jp.archive.ubuntu.com/ubuntu/dists/saucy-updates/restricted/source/Sources  404  Not Found

W: Failed to fetch http://jp.archive.ubuntu.com/ubuntu/dists/saucy-updates/universe/source/Sources  404  Not Found

W: Failed to fetch http://jp.archive.ubuntu.com/ubuntu/dists/saucy-updates/multiverse/source/Sources  404  Not Found

W: Failed to fetch http://jp.archive.ubuntu.com/ubuntu/dists/saucy-updates/main/binary-i386/Packages  404  Not Found

W: Failed to fetch http://jp.archive.ubuntu.com/ubuntu/dists/saucy-updates/restricted/binary-i386/Packages  404  Not Found

W: Failed to fetch http://jp.archive.ubuntu.com/ubuntu/dists/saucy-updates/universe/binary-i386/Packages  404  Not Found

W: Failed to fetch http://jp.archive.ubuntu.com/ubuntu/dists/saucy-updates/multiverse/binary-i386/Packages  404  Not Found

W: Failed to fetch http://jp.archive.ubuntu.com/ubuntu/dists/saucy-backports/main/source/Sources  404  Not Found

W: Failed to fetch http://jp.archive.ubuntu.com/ubuntu/dists/saucy-backports/restricted/source/Sources  404  Not Found

W: Failed to fetch http://jp.archive.ubuntu.com/ubuntu/dists/saucy-backports/universe/source/Sources  404  Not Found

W: Failed to fetch http://jp.archive.ubuntu.com/ubuntu/dists/saucy-backports/multiverse/source/Sources  404  Not Found

W: Failed to fetch http://jp.archive.ubuntu.com/ubuntu/dists/saucy-backports/main/binary-i386/Packages  404  Not Found

W: Failed to fetch http://jp.archive.ubuntu.com/ubuntu/dists/saucy-backports/restricted/binary-i386/Packages  404  Not Found

W: Failed to fetch http://jp.archive.ubuntu.com/ubuntu/dists/saucy-backports/universe/binary-i386/Packages  404  Not Found

W: Failed to fetch http://jp.archive.ubuntu.com/ubuntu/dists/saucy-backports/multiverse/binary-i386/Packages  404  Not Found

W: Failed to fetch http://security.ubuntu.com/ubuntu/dists/saucy-security/main/source/Sources  404  Not Found [IP: 91.189.88.149 80]

W: Failed to fetch http://security.ubuntu.com/ubuntu/dists/saucy-security/restricted/source/Sources  404  Not Found [IP: 91.189.88.149 80]

W: Failed to fetch http://security.ubuntu.com/ubuntu/dists/saucy-security/universe/source/Sources  404  Not Found [IP: 91.189.88.149 80]

W: Failed to fetch http://security.ubuntu.com/ubuntu/dists/saucy-security/multiverse/source/Sources  404  Not Found [IP: 91.189.88.149 80]

W: Failed to fetch http://security.ubuntu.com/ubuntu/dists/saucy-security/main/binary-i386/Packages  404  Not Found [IP: 91.189.88.149 80]

W: Failed to fetch http://security.ubuntu.com/ubuntu/dists/saucy-security/restricted/binary-i386/Packages  404  Not Found [IP: 91.189.88.149 80]

W: Failed to fetch http://security.ubuntu.com/ubuntu/dists/saucy-security/universe/binary-i386/Packages  404  Not Found [IP: 91.189.88.149 80]

W: Failed to fetch http://security.ubuntu.com/ubuntu/dists/saucy-security/multiverse/binary-i386/Packages  404  Not Found [IP: 91.189.88.149 80]

E: Some index files failed to download. They have been ignored, or old ones used instead.






/etc/apt/sources.listをどのように変えればいいのかご教授願います。