vignesh2066
June 6th, 2013, 10:56 AM
When I fired my command
sudo apt-get update
found the following error
vignesh@ubuntu:~$ sudo apt-get update
Get:1 ftp://ftp.iitb.ac.in natty InRelease
Ign ftp://ftp.iitb.ac.in natty InRelease
Get:2 ftp://ftp.iitb.ac.in natty Release.gpg [198 B]
Ign http://ppa.launchpad.net natty InRelease
Ign http://archive.cloudera.com precise-cdh4 InRelease
Ign http://archive.cloudera.com lucid-cdh3 InRelease
Get:3 ftp://ftp.iitb.ac.in natty Release [39.8 kB]
Get:4 http://ppa.launchpad.net natty Release.gpg [316 B]
Get:5 http://archive.cloudera.com precise-cdh4 Release.gpg [198 B]
Get:6 http://ppa.launchpad.net natty Release [9,731 B]
Get:7 http://archive.cloudera.com lucid-cdh3 Release.gpg [198 B]
Get:8 http://archive.cloudera.com precise-cdh4 Release [1,682 B]
Get:9 http://ppa.launchpad.net natty/main Sources [2,544 B]
Get:10 http://archive.cloudera.com lucid-cdh3 Release [2,419 B]
Get:11 http://archive.cloudera.com precise-cdh4/contrib Sources [6,773 B]
Get:12 http://ppa.launchpad.net natty/main amd64 Packages [7,720 B]
Ign http://ppa.launchpad.net natty/main TranslationIndex
Get:13 http://archive.cloudera.com precise-cdh4/contrib amd64 Packages [19.8 kB]
Get:14 ftp://ftp.iitb.ac.in natty/main Sources [862 kB]
Ign http://archive.cloudera.com precise-cdh4/contrib TranslationIndex
Get:15 http://archive.cloudera.com lucid-cdh3/contrib Sources [5,329 B]
Get:16 http://archive.cloudera.com lucid-cdh3/contrib amd64 Packages [14.0 kB]
Ign http://archive.cloudera.com lucid-cdh3/contrib TranslationIndex
Ign http://ppa.launchpad.net natty/main Translation-en_US
Ign http://ppa.launchpad.net natty/main Translation-en
Ign http://archive.cloudera.com precise-cdh4/contrib Translation-en_US
Ign http://archive.canonical.com natty InRelease
Ign http://archive.cloudera.com precise-cdh4/contrib Translation-en
Ign http://archive.cloudera.com lucid-cdh3/contrib Translation-en_US
Get:17 http://archive.canonical.com natty Release.gpg [198 B]
Ign http://archive.cloudera.com lucid-cdh3/contrib Translation-en
Get:18 http://archive.canonical.com natty Release [5,916 B]
Get:19 http://archive.canonical.com natty/partner amd64 Packages [6,634 B]
Ign http://archive.canonical.com natty/partner TranslationIndex
Ign http://us.archive.ubuntu.com natty InRelease
Ign http://us.archive.ubuntu.com natty-updates InRelease
Ign http://cran.rstudio.com natty/ InRelease
Ign http://us.archive.ubuntu.com natty Release.gpg
Ign http://cran.rstudio.com natty/ Release.gpg
Ign http://us.archive.ubuntu.com natty-updates Release.gpg
Ign http://cran.rstudio.com natty/ Release
Ign http://archive.canonical.com natty/partner Translation-en_US
Ign http://us.archive.ubuntu.com natty Release
Ign http://archive.canonical.com natty/partner Translation-en
Ign http://us.archive.ubuntu.com natty-updates Release
Ign http://us.archive.ubuntu.com natty/main TranslationIndex
Ign http://us.archive.ubuntu.com natty/multiverse TranslationIndex
Ign http://us.archive.ubuntu.com natty/restricted TranslationIndex
Ign http://us.archive.ubuntu.com natty/universe TranslationIndex
Ign http://us.archive.ubuntu.com natty-updates/main TranslationIndex
Ign http://us.archive.ubuntu.com natty-updates/multiverse TranslationIndex
Ign http://us.archive.ubuntu.com natty-updates/restricted TranslationIndex
Ign http://us.archive.ubuntu.com natty-updates/universe TranslationIndex
Err http://cran.rstudio.com natty/ Packages
404 Not Found [IP: 204.246.165.171 80]
Ign http://cran.rstudio.com natty/ Translation-en_US
Ign http://cran.rstudio.com natty/ Translation-en
Ign http://security.ubuntu.com natty-security InRelease
Err http://us.archive.ubuntu.com natty/main Sources
404 Not Found [IP: 91.189.91.14 80]
Err http://us.archive.ubuntu.com natty/restricted Sources
404 Not Found [IP: 91.189.91.14 80]
Err http://us.archive.ubuntu.com natty/universe Sources
404 Not Found [IP: 91.189.91.14 80]
Err http://us.archive.ubuntu.com natty/multiverse Sources
404 Not Found [IP: 91.189.91.14 80]
Err http://us.archive.ubuntu.com natty/main amd64 Packages
404 Not Found [IP: 91.189.91.14 80]
Err http://us.archive.ubuntu.com natty/restricted amd64 Packages
404 Not Found [IP: 91.189.91.14 80]
Err http://us.archive.ubuntu.com natty/universe amd64 Packages
404 Not Found [IP: 91.189.91.14 80]
Err http://us.archive.ubuntu.com natty/multiverse amd64 Packages
404 Not Found [IP: 91.189.91.14 80]
Err http://us.archive.ubuntu.com natty-updates/main Sources
404 Not Found [IP: 91.189.91.14 80]
Err http://us.archive.ubuntu.com natty-updates/restricted Sources
404 Not Found [IP: 91.189.91.14 80]
Err http://us.archive.ubuntu.com natty-updates/universe Sources
404 Not Found [IP: 91.189.91.14 80]
Err http://us.archive.ubuntu.com natty-updates/multiverse Sources
404 Not Found [IP: 91.189.91.14 80]
Err http://us.archive.ubuntu.com natty-updates/main amd64 Packages
404 Not Found [IP: 91.189.91.14 80]
Err http://us.archive.ubuntu.com natty-updates/restricted amd64 Packages
404 Not Found [IP: 91.189.91.14 80]
Err http://us.archive.ubuntu.com natty-updates/universe amd64 Packages
404 Not Found [IP: 91.189.91.14 80]
Err http://us.archive.ubuntu.com natty-updates/multiverse amd64 Packages
404 Not Found [IP: 91.189.91.14 80]
Ign http://us.archive.ubuntu.com natty/main Translation-en_US
Ign http://us.archive.ubuntu.com natty/main Translation-en
Ign http://us.archive.ubuntu.com natty/multiverse Translation-en_US
Ign http://us.archive.ubuntu.com natty/multiverse Translation-en
Ign http://us.archive.ubuntu.com natty/restricted Translation-en_US
Ign http://us.archive.ubuntu.com natty/restricted Translation-en
Ign http://us.archive.ubuntu.com natty/universe Translation-en_US
Ign http://us.archive.ubuntu.com natty/universe Translation-en
Ign http://us.archive.ubuntu.com natty-updates/main Translation-en_US
Ign http://us.archive.ubuntu.com natty-updates/main Translation-en
Ign http://us.archive.ubuntu.com natty-updates/multiverse Translation-en_US
Ign http://us.archive.ubuntu.com natty-updates/multiverse Translation-en
Ign http://us.archive.ubuntu.com natty-updates/restricted Translation-en_US
Ign http://us.archive.ubuntu.com natty-updates/restricted Translation-en
Ign http://us.archive.ubuntu.com natty-updates/universe Translation-en_US
Ign http://us.archive.ubuntu.com natty-updates/universe Translation-en
Ign http://security.ubuntu.com natty-security Release.gpg
Ign http://security.ubuntu.com natty-security Release
Ign http://security.ubuntu.com natty-security/main TranslationIndex
Ign http://security.ubuntu.com natty-security/multiverse TranslationIndex
Ign http://security.ubuntu.com natty-security/restricted TranslationIndex
Ign http://security.ubuntu.com natty-security/universe TranslationIndex
Err http://security.ubuntu.com natty-security/main Sources
404 Not Found [IP: 91.189.92.190 80]
Err http://security.ubuntu.com natty-security/restricted Sources
404 Not Found [IP: 91.189.92.190 80]
Err http://security.ubuntu.com natty-security/universe Sources
404 Not Found [IP: 91.189.92.190 80]
Err http://security.ubuntu.com natty-security/multiverse Sources
404 Not Found [IP: 91.189.92.190 80]
Err http://security.ubuntu.com natty-security/main amd64 Packages
404 Not Found [IP: 91.189.92.190 80]
Err http://security.ubuntu.com natty-security/restricted amd64 Packages
404 Not Found [IP: 91.189.92.190 80]
Err http://security.ubuntu.com natty-security/universe amd64 Packages
404 Not Found [IP: 91.189.92.190 80]
Err http://security.ubuntu.com natty-security/multiverse amd64 Packages
404 Not Found [IP: 91.189.92.190 80]
Ign http://security.ubuntu.com natty-security/main Translation-en_US
Ign http://security.ubuntu.com natty-security/main Translation-en
Ign http://security.ubuntu.com natty-security/multiverse Translation-en_US
Ign http://security.ubuntu.com natty-security/multiverse Translation-en
Ign http://security.ubuntu.com natty-security/restricted Translation-en_US
Ign http://security.ubuntu.com natty-security/restricted Translation-en
Ign http://security.ubuntu.com natty-security/universe Translation-en_US
Ign http://security.ubuntu.com natty-security/universe Translation-en
Get:20 ftp://ftp.iitb.ac.in natty/main amd64 Packages [1,550 kB]
Get:21 ftp://ftp.iitb.ac.in natty/main TranslationIndex
Ign ftp://ftp.iitb.ac.in natty/main TranslationIndex
Get:22 ftp://ftp.iitb.ac.in natty/main Translation-en_US
Get:23 ftp://ftp.iitb.ac.in natty/main Translation-en
Get:24 ftp://ftp.iitb.ac.in natty/main Translation-en_US
Get:25 ftp://ftp.iitb.ac.in natty/main Translation-en
Get:26 ftp://ftp.iitb.ac.in natty/main Translation-en_US
Get:27 ftp://ftp.iitb.ac.in natty/main Translation-en
Get:28 ftp://ftp.iitb.ac.in natty/main Translation-en_US
Get:29 ftp://ftp.iitb.ac.in natty/main Translation-en
Get:30 ftp://ftp.iitb.ac.in natty/main Translation-en_US
Ign ftp://ftp.iitb.ac.in natty/main Translation-en_US
Get:31 ftp://ftp.iitb.ac.in natty/main Translation-en
Ign ftp://ftp.iitb.ac.in natty/main Translation-en
Fetched 2,535 kB in 3min 36s (11.7 kB/s)
W: Failed to fetch http://cran.rstudio.com/bin/linux/ubuntu/natty/Packages 404 Not Found [IP: 204.246.165.171 80]
W: Failed to fetch http://us.archive.ubuntu.com/ubuntu/dists/natty/main/source/Sources 404 Not Found [IP: 91.189.91.14 80]
W: Failed to fetch http://us.archive.ubuntu.com/ubuntu/dists/natty/restricted/source/Sources 404 Not Found [IP: 91.189.91.14 80]
W: Failed to fetch http://us.archive.ubuntu.com/ubuntu/dists/natty/universe/source/Sources 404 Not Found [IP: 91.189.91.14 80]
W: Failed to fetch http://us.archive.ubuntu.com/ubuntu/dists/natty/multiverse/source/Sources 404 Not Found [IP: 91.189.91.14 80]
W: Failed to fetch http://us.archive.ubuntu.com/ubuntu/dists/natty/main/binary-amd64/Packages 404 Not Found [IP: 91.189.91.14 80]
W: Failed to fetch http://us.archive.ubuntu.com/ubuntu/dists/natty/restricted/binary-amd64/Packages 404 Not Found [IP: 91.189.91.14 80]
W: Failed to fetch http://us.archive.ubuntu.com/ubuntu/dists/natty/universe/binary-amd64/Packages 404 Not Found [IP: 91.189.91.14 80]
W: Failed to fetch http://us.archive.ubuntu.com/ubuntu/dists/natty/multiverse/binary-amd64/Packages 404 Not Found [IP: 91.189.91.14 80]
W: Failed to fetch http://us.archive.ubuntu.com/ubuntu/dists/natty-updates/main/source/Sources 404 Not Found [IP: 91.189.91.14 80]
W: Failed to fetch http://us.archive.ubuntu.com/ubuntu/dists/natty-updates/restricted/source/Sources 404 Not Found [IP: 91.189.91.14 80]
W: Failed to fetch http://us.archive.ubuntu.com/ubuntu/dists/natty-updates/universe/source/Sources 404 Not Found [IP: 91.189.91.14 80]
W: Failed to fetch http://us.archive.ubuntu.com/ubuntu/dists/natty-updates/multiverse/source/Sources 404 Not Found [IP: 91.189.91.14 80]
W: Failed to fetch http://us.archive.ubuntu.com/ubuntu/dists/natty-updates/main/binary-amd64/Packages 404 Not Found [IP: 91.189.91.14 80]
W: Failed to fetch http://us.archive.ubuntu.com/ubuntu/dists/natty-updates/restricted/binary-amd64/Packages 404 Not Found [IP: 91.189.91.14 80]
W: Failed to fetch http://us.archive.ubuntu.com/ubuntu/dists/natty-updates/universe/binary-amd64/Packages 404 Not Found [IP: 91.189.91.14 80]
W: Failed to fetch http://us.archive.ubuntu.com/ubuntu/dists/natty-updates/multiverse/binary-amd64/Packages 404 Not Found [IP: 91.189.91.14 80]
W: Failed to fetch http://security.ubuntu.com/ubuntu/dists/natty-security/main/source/Sources 404 Not Found [IP: 91.189.92.190 80]
W: Failed to fetch http://security.ubuntu.com/ubuntu/dists/natty-security/restricted/source/Sources 404 Not Found [IP: 91.189.92.190 80]
W: Failed to fetch http://security.ubuntu.com/ubuntu/dists/natty-security/universe/source/Sources 404 Not Found [IP: 91.189.92.190 80]
W: Failed to fetch http://security.ubuntu.com/ubuntu/dists/natty-security/multiverse/source/Sources 404 Not Found [IP: 91.189.92.190 80]
W: Failed to fetch http://security.ubuntu.com/ubuntu/dists/natty-security/main/binary-amd64/Packages 404 Not Found [IP: 91.189.92.190 80]
W: Failed to fetch http://security.ubuntu.com/ubuntu/dists/natty-security/restricted/binary-amd64/Packages 404 Not Found [IP: 91.189.92.190 80]
W: Failed to fetch http://security.ubuntu.com/ubuntu/dists/natty-security/universe/binary-amd64/Packages 404 Not Found [IP: 91.189.92.190 80]
W: Failed to fetch http://security.ubuntu.com/ubuntu/dists/natty-security/multiverse/binary-amd64/Packages 404 Not Found [IP: 91.189.92.190 80]
E: Some index files failed to download. They have been ignored, or old ones used instead.
FYI : vignesh@ubuntu:~$ cat /etc/apt/sources.list
# deb cdrom:[Ubuntu 11.04 _Natty Narwhal_ - Release amd64 (20110427.1)]/ natty main restricted
# See http://help.ubuntu.com/community/UpgradeNotes for how to upgrade to
# newer versions of the distribution.
deb http://us.archive.ubuntu.com/ubuntu/ natty main restricted
deb-src http://us.archive.ubuntu.com/ubuntu/ natty main restricted
## Major bug fix updates produced after the final release of the
## distribution.
deb http://us.archive.ubuntu.com/ubuntu/ natty-updates main restricted
deb-src http://us.archive.ubuntu.com/ubuntu/ natty-updates main restricted
## N.B. software from this repository is ENTIRELY UNSUPPORTED by the Ubuntu
## team. Also, please note that software in universe WILL NOT receive any
## review or updates from the Ubuntu security team.
deb http://us.archive.ubuntu.com/ubuntu/ natty universe
deb-src http://us.archive.ubuntu.com/ubuntu/ natty universe
deb http://us.archive.ubuntu.com/ubuntu/ natty-updates universe
deb-src http://us.archive.ubuntu.com/ubuntu/ natty-updates universe
## N.B. software from this repository is ENTIRELY UNSUPPORTED by the Ubuntu
## team, and may not be under a free licence. Please satisfy yourself as to
## your rights to use the software. Also, please note that software in
## multiverse WILL NOT receive any review or updates from the Ubuntu
## security team.
deb http://us.archive.ubuntu.com/ubuntu/ natty multiverse
deb-src http://us.archive.ubuntu.com/ubuntu/ natty multiverse
deb http://us.archive.ubuntu.com/ubuntu/ natty-updates multiverse
deb-src http://us.archive.ubuntu.com/ubuntu/ natty-updates multiverse
## Uncomment the following two lines to add software from the 'backports'
## repository.
## N.B. software from this repository may not have been tested as
## extensively as that contained in the main release, although it includes
## newer versions of some applications which may provide useful features.
## Also, please note that software in backports WILL NOT receive any review
## or updates from the Ubuntu security team.
# deb http://us.archive.ubuntu.com/ubuntu/ natty-backports main restricted universe multiverse
# deb-src http://us.archive.ubuntu.com/ubuntu/ natty-backports main restricted universe multiverse
deb http://cran.rstudio.com/bin/linux/ubuntu natty/
deb ftp://ftp.iitb.ac.in/distributions/ubuntu/archives/ natty main
deb-src ftp://ftp.iitb.ac.in/distributions/ubuntu/archives/ natty main
deb http://security.ubuntu.com/ubuntu natty-security main restricted
deb-src http://security.ubuntu.com/ubuntu natty-security main restricted
deb http://security.ubuntu.com/ubuntu natty-security universe
deb-src http://security.ubuntu.com/ubuntu natty-security universe
deb http://security.ubuntu.com/ubuntu natty-security multiverse
deb-src http://security.ubuntu.com/ubuntu natty-security multiverse
## Uncomment the following two lines to add software from Canonical's
## 'partner' repository.
## This software is not part of Ubuntu, but is offered by Canonical and the
## respective vendors as a service to Ubuntu users.
deb http://archive.canonical.com/ubuntu natty partner
# deb-src http://archive.canonical.com/ubuntu natty partner
## Uncomment the following two lines to add software from Ubuntu's
## 'extras' repository.
## This software is not part of Ubuntu, but is offered by third-party
## developers who want to ship their latest software.
# deb http://extras.ubuntu.com/ubuntu natty main
# deb-src http://extras.ubuntu.com/ubuntu natty main
Please let me know, how can I solve this.
sudo apt-get update
found the following error
vignesh@ubuntu:~$ sudo apt-get update
Get:1 ftp://ftp.iitb.ac.in natty InRelease
Ign ftp://ftp.iitb.ac.in natty InRelease
Get:2 ftp://ftp.iitb.ac.in natty Release.gpg [198 B]
Ign http://ppa.launchpad.net natty InRelease
Ign http://archive.cloudera.com precise-cdh4 InRelease
Ign http://archive.cloudera.com lucid-cdh3 InRelease
Get:3 ftp://ftp.iitb.ac.in natty Release [39.8 kB]
Get:4 http://ppa.launchpad.net natty Release.gpg [316 B]
Get:5 http://archive.cloudera.com precise-cdh4 Release.gpg [198 B]
Get:6 http://ppa.launchpad.net natty Release [9,731 B]
Get:7 http://archive.cloudera.com lucid-cdh3 Release.gpg [198 B]
Get:8 http://archive.cloudera.com precise-cdh4 Release [1,682 B]
Get:9 http://ppa.launchpad.net natty/main Sources [2,544 B]
Get:10 http://archive.cloudera.com lucid-cdh3 Release [2,419 B]
Get:11 http://archive.cloudera.com precise-cdh4/contrib Sources [6,773 B]
Get:12 http://ppa.launchpad.net natty/main amd64 Packages [7,720 B]
Ign http://ppa.launchpad.net natty/main TranslationIndex
Get:13 http://archive.cloudera.com precise-cdh4/contrib amd64 Packages [19.8 kB]
Get:14 ftp://ftp.iitb.ac.in natty/main Sources [862 kB]
Ign http://archive.cloudera.com precise-cdh4/contrib TranslationIndex
Get:15 http://archive.cloudera.com lucid-cdh3/contrib Sources [5,329 B]
Get:16 http://archive.cloudera.com lucid-cdh3/contrib amd64 Packages [14.0 kB]
Ign http://archive.cloudera.com lucid-cdh3/contrib TranslationIndex
Ign http://ppa.launchpad.net natty/main Translation-en_US
Ign http://ppa.launchpad.net natty/main Translation-en
Ign http://archive.cloudera.com precise-cdh4/contrib Translation-en_US
Ign http://archive.canonical.com natty InRelease
Ign http://archive.cloudera.com precise-cdh4/contrib Translation-en
Ign http://archive.cloudera.com lucid-cdh3/contrib Translation-en_US
Get:17 http://archive.canonical.com natty Release.gpg [198 B]
Ign http://archive.cloudera.com lucid-cdh3/contrib Translation-en
Get:18 http://archive.canonical.com natty Release [5,916 B]
Get:19 http://archive.canonical.com natty/partner amd64 Packages [6,634 B]
Ign http://archive.canonical.com natty/partner TranslationIndex
Ign http://us.archive.ubuntu.com natty InRelease
Ign http://us.archive.ubuntu.com natty-updates InRelease
Ign http://cran.rstudio.com natty/ InRelease
Ign http://us.archive.ubuntu.com natty Release.gpg
Ign http://cran.rstudio.com natty/ Release.gpg
Ign http://us.archive.ubuntu.com natty-updates Release.gpg
Ign http://cran.rstudio.com natty/ Release
Ign http://archive.canonical.com natty/partner Translation-en_US
Ign http://us.archive.ubuntu.com natty Release
Ign http://archive.canonical.com natty/partner Translation-en
Ign http://us.archive.ubuntu.com natty-updates Release
Ign http://us.archive.ubuntu.com natty/main TranslationIndex
Ign http://us.archive.ubuntu.com natty/multiverse TranslationIndex
Ign http://us.archive.ubuntu.com natty/restricted TranslationIndex
Ign http://us.archive.ubuntu.com natty/universe TranslationIndex
Ign http://us.archive.ubuntu.com natty-updates/main TranslationIndex
Ign http://us.archive.ubuntu.com natty-updates/multiverse TranslationIndex
Ign http://us.archive.ubuntu.com natty-updates/restricted TranslationIndex
Ign http://us.archive.ubuntu.com natty-updates/universe TranslationIndex
Err http://cran.rstudio.com natty/ Packages
404 Not Found [IP: 204.246.165.171 80]
Ign http://cran.rstudio.com natty/ Translation-en_US
Ign http://cran.rstudio.com natty/ Translation-en
Ign http://security.ubuntu.com natty-security InRelease
Err http://us.archive.ubuntu.com natty/main Sources
404 Not Found [IP: 91.189.91.14 80]
Err http://us.archive.ubuntu.com natty/restricted Sources
404 Not Found [IP: 91.189.91.14 80]
Err http://us.archive.ubuntu.com natty/universe Sources
404 Not Found [IP: 91.189.91.14 80]
Err http://us.archive.ubuntu.com natty/multiverse Sources
404 Not Found [IP: 91.189.91.14 80]
Err http://us.archive.ubuntu.com natty/main amd64 Packages
404 Not Found [IP: 91.189.91.14 80]
Err http://us.archive.ubuntu.com natty/restricted amd64 Packages
404 Not Found [IP: 91.189.91.14 80]
Err http://us.archive.ubuntu.com natty/universe amd64 Packages
404 Not Found [IP: 91.189.91.14 80]
Err http://us.archive.ubuntu.com natty/multiverse amd64 Packages
404 Not Found [IP: 91.189.91.14 80]
Err http://us.archive.ubuntu.com natty-updates/main Sources
404 Not Found [IP: 91.189.91.14 80]
Err http://us.archive.ubuntu.com natty-updates/restricted Sources
404 Not Found [IP: 91.189.91.14 80]
Err http://us.archive.ubuntu.com natty-updates/universe Sources
404 Not Found [IP: 91.189.91.14 80]
Err http://us.archive.ubuntu.com natty-updates/multiverse Sources
404 Not Found [IP: 91.189.91.14 80]
Err http://us.archive.ubuntu.com natty-updates/main amd64 Packages
404 Not Found [IP: 91.189.91.14 80]
Err http://us.archive.ubuntu.com natty-updates/restricted amd64 Packages
404 Not Found [IP: 91.189.91.14 80]
Err http://us.archive.ubuntu.com natty-updates/universe amd64 Packages
404 Not Found [IP: 91.189.91.14 80]
Err http://us.archive.ubuntu.com natty-updates/multiverse amd64 Packages
404 Not Found [IP: 91.189.91.14 80]
Ign http://us.archive.ubuntu.com natty/main Translation-en_US
Ign http://us.archive.ubuntu.com natty/main Translation-en
Ign http://us.archive.ubuntu.com natty/multiverse Translation-en_US
Ign http://us.archive.ubuntu.com natty/multiverse Translation-en
Ign http://us.archive.ubuntu.com natty/restricted Translation-en_US
Ign http://us.archive.ubuntu.com natty/restricted Translation-en
Ign http://us.archive.ubuntu.com natty/universe Translation-en_US
Ign http://us.archive.ubuntu.com natty/universe Translation-en
Ign http://us.archive.ubuntu.com natty-updates/main Translation-en_US
Ign http://us.archive.ubuntu.com natty-updates/main Translation-en
Ign http://us.archive.ubuntu.com natty-updates/multiverse Translation-en_US
Ign http://us.archive.ubuntu.com natty-updates/multiverse Translation-en
Ign http://us.archive.ubuntu.com natty-updates/restricted Translation-en_US
Ign http://us.archive.ubuntu.com natty-updates/restricted Translation-en
Ign http://us.archive.ubuntu.com natty-updates/universe Translation-en_US
Ign http://us.archive.ubuntu.com natty-updates/universe Translation-en
Ign http://security.ubuntu.com natty-security Release.gpg
Ign http://security.ubuntu.com natty-security Release
Ign http://security.ubuntu.com natty-security/main TranslationIndex
Ign http://security.ubuntu.com natty-security/multiverse TranslationIndex
Ign http://security.ubuntu.com natty-security/restricted TranslationIndex
Ign http://security.ubuntu.com natty-security/universe TranslationIndex
Err http://security.ubuntu.com natty-security/main Sources
404 Not Found [IP: 91.189.92.190 80]
Err http://security.ubuntu.com natty-security/restricted Sources
404 Not Found [IP: 91.189.92.190 80]
Err http://security.ubuntu.com natty-security/universe Sources
404 Not Found [IP: 91.189.92.190 80]
Err http://security.ubuntu.com natty-security/multiverse Sources
404 Not Found [IP: 91.189.92.190 80]
Err http://security.ubuntu.com natty-security/main amd64 Packages
404 Not Found [IP: 91.189.92.190 80]
Err http://security.ubuntu.com natty-security/restricted amd64 Packages
404 Not Found [IP: 91.189.92.190 80]
Err http://security.ubuntu.com natty-security/universe amd64 Packages
404 Not Found [IP: 91.189.92.190 80]
Err http://security.ubuntu.com natty-security/multiverse amd64 Packages
404 Not Found [IP: 91.189.92.190 80]
Ign http://security.ubuntu.com natty-security/main Translation-en_US
Ign http://security.ubuntu.com natty-security/main Translation-en
Ign http://security.ubuntu.com natty-security/multiverse Translation-en_US
Ign http://security.ubuntu.com natty-security/multiverse Translation-en
Ign http://security.ubuntu.com natty-security/restricted Translation-en_US
Ign http://security.ubuntu.com natty-security/restricted Translation-en
Ign http://security.ubuntu.com natty-security/universe Translation-en_US
Ign http://security.ubuntu.com natty-security/universe Translation-en
Get:20 ftp://ftp.iitb.ac.in natty/main amd64 Packages [1,550 kB]
Get:21 ftp://ftp.iitb.ac.in natty/main TranslationIndex
Ign ftp://ftp.iitb.ac.in natty/main TranslationIndex
Get:22 ftp://ftp.iitb.ac.in natty/main Translation-en_US
Get:23 ftp://ftp.iitb.ac.in natty/main Translation-en
Get:24 ftp://ftp.iitb.ac.in natty/main Translation-en_US
Get:25 ftp://ftp.iitb.ac.in natty/main Translation-en
Get:26 ftp://ftp.iitb.ac.in natty/main Translation-en_US
Get:27 ftp://ftp.iitb.ac.in natty/main Translation-en
Get:28 ftp://ftp.iitb.ac.in natty/main Translation-en_US
Get:29 ftp://ftp.iitb.ac.in natty/main Translation-en
Get:30 ftp://ftp.iitb.ac.in natty/main Translation-en_US
Ign ftp://ftp.iitb.ac.in natty/main Translation-en_US
Get:31 ftp://ftp.iitb.ac.in natty/main Translation-en
Ign ftp://ftp.iitb.ac.in natty/main Translation-en
Fetched 2,535 kB in 3min 36s (11.7 kB/s)
W: Failed to fetch http://cran.rstudio.com/bin/linux/ubuntu/natty/Packages 404 Not Found [IP: 204.246.165.171 80]
W: Failed to fetch http://us.archive.ubuntu.com/ubuntu/dists/natty/main/source/Sources 404 Not Found [IP: 91.189.91.14 80]
W: Failed to fetch http://us.archive.ubuntu.com/ubuntu/dists/natty/restricted/source/Sources 404 Not Found [IP: 91.189.91.14 80]
W: Failed to fetch http://us.archive.ubuntu.com/ubuntu/dists/natty/universe/source/Sources 404 Not Found [IP: 91.189.91.14 80]
W: Failed to fetch http://us.archive.ubuntu.com/ubuntu/dists/natty/multiverse/source/Sources 404 Not Found [IP: 91.189.91.14 80]
W: Failed to fetch http://us.archive.ubuntu.com/ubuntu/dists/natty/main/binary-amd64/Packages 404 Not Found [IP: 91.189.91.14 80]
W: Failed to fetch http://us.archive.ubuntu.com/ubuntu/dists/natty/restricted/binary-amd64/Packages 404 Not Found [IP: 91.189.91.14 80]
W: Failed to fetch http://us.archive.ubuntu.com/ubuntu/dists/natty/universe/binary-amd64/Packages 404 Not Found [IP: 91.189.91.14 80]
W: Failed to fetch http://us.archive.ubuntu.com/ubuntu/dists/natty/multiverse/binary-amd64/Packages 404 Not Found [IP: 91.189.91.14 80]
W: Failed to fetch http://us.archive.ubuntu.com/ubuntu/dists/natty-updates/main/source/Sources 404 Not Found [IP: 91.189.91.14 80]
W: Failed to fetch http://us.archive.ubuntu.com/ubuntu/dists/natty-updates/restricted/source/Sources 404 Not Found [IP: 91.189.91.14 80]
W: Failed to fetch http://us.archive.ubuntu.com/ubuntu/dists/natty-updates/universe/source/Sources 404 Not Found [IP: 91.189.91.14 80]
W: Failed to fetch http://us.archive.ubuntu.com/ubuntu/dists/natty-updates/multiverse/source/Sources 404 Not Found [IP: 91.189.91.14 80]
W: Failed to fetch http://us.archive.ubuntu.com/ubuntu/dists/natty-updates/main/binary-amd64/Packages 404 Not Found [IP: 91.189.91.14 80]
W: Failed to fetch http://us.archive.ubuntu.com/ubuntu/dists/natty-updates/restricted/binary-amd64/Packages 404 Not Found [IP: 91.189.91.14 80]
W: Failed to fetch http://us.archive.ubuntu.com/ubuntu/dists/natty-updates/universe/binary-amd64/Packages 404 Not Found [IP: 91.189.91.14 80]
W: Failed to fetch http://us.archive.ubuntu.com/ubuntu/dists/natty-updates/multiverse/binary-amd64/Packages 404 Not Found [IP: 91.189.91.14 80]
W: Failed to fetch http://security.ubuntu.com/ubuntu/dists/natty-security/main/source/Sources 404 Not Found [IP: 91.189.92.190 80]
W: Failed to fetch http://security.ubuntu.com/ubuntu/dists/natty-security/restricted/source/Sources 404 Not Found [IP: 91.189.92.190 80]
W: Failed to fetch http://security.ubuntu.com/ubuntu/dists/natty-security/universe/source/Sources 404 Not Found [IP: 91.189.92.190 80]
W: Failed to fetch http://security.ubuntu.com/ubuntu/dists/natty-security/multiverse/source/Sources 404 Not Found [IP: 91.189.92.190 80]
W: Failed to fetch http://security.ubuntu.com/ubuntu/dists/natty-security/main/binary-amd64/Packages 404 Not Found [IP: 91.189.92.190 80]
W: Failed to fetch http://security.ubuntu.com/ubuntu/dists/natty-security/restricted/binary-amd64/Packages 404 Not Found [IP: 91.189.92.190 80]
W: Failed to fetch http://security.ubuntu.com/ubuntu/dists/natty-security/universe/binary-amd64/Packages 404 Not Found [IP: 91.189.92.190 80]
W: Failed to fetch http://security.ubuntu.com/ubuntu/dists/natty-security/multiverse/binary-amd64/Packages 404 Not Found [IP: 91.189.92.190 80]
E: Some index files failed to download. They have been ignored, or old ones used instead.
FYI : vignesh@ubuntu:~$ cat /etc/apt/sources.list
# deb cdrom:[Ubuntu 11.04 _Natty Narwhal_ - Release amd64 (20110427.1)]/ natty main restricted
# See http://help.ubuntu.com/community/UpgradeNotes for how to upgrade to
# newer versions of the distribution.
deb http://us.archive.ubuntu.com/ubuntu/ natty main restricted
deb-src http://us.archive.ubuntu.com/ubuntu/ natty main restricted
## Major bug fix updates produced after the final release of the
## distribution.
deb http://us.archive.ubuntu.com/ubuntu/ natty-updates main restricted
deb-src http://us.archive.ubuntu.com/ubuntu/ natty-updates main restricted
## N.B. software from this repository is ENTIRELY UNSUPPORTED by the Ubuntu
## team. Also, please note that software in universe WILL NOT receive any
## review or updates from the Ubuntu security team.
deb http://us.archive.ubuntu.com/ubuntu/ natty universe
deb-src http://us.archive.ubuntu.com/ubuntu/ natty universe
deb http://us.archive.ubuntu.com/ubuntu/ natty-updates universe
deb-src http://us.archive.ubuntu.com/ubuntu/ natty-updates universe
## N.B. software from this repository is ENTIRELY UNSUPPORTED by the Ubuntu
## team, and may not be under a free licence. Please satisfy yourself as to
## your rights to use the software. Also, please note that software in
## multiverse WILL NOT receive any review or updates from the Ubuntu
## security team.
deb http://us.archive.ubuntu.com/ubuntu/ natty multiverse
deb-src http://us.archive.ubuntu.com/ubuntu/ natty multiverse
deb http://us.archive.ubuntu.com/ubuntu/ natty-updates multiverse
deb-src http://us.archive.ubuntu.com/ubuntu/ natty-updates multiverse
## Uncomment the following two lines to add software from the 'backports'
## repository.
## N.B. software from this repository may not have been tested as
## extensively as that contained in the main release, although it includes
## newer versions of some applications which may provide useful features.
## Also, please note that software in backports WILL NOT receive any review
## or updates from the Ubuntu security team.
# deb http://us.archive.ubuntu.com/ubuntu/ natty-backports main restricted universe multiverse
# deb-src http://us.archive.ubuntu.com/ubuntu/ natty-backports main restricted universe multiverse
deb http://cran.rstudio.com/bin/linux/ubuntu natty/
deb ftp://ftp.iitb.ac.in/distributions/ubuntu/archives/ natty main
deb-src ftp://ftp.iitb.ac.in/distributions/ubuntu/archives/ natty main
deb http://security.ubuntu.com/ubuntu natty-security main restricted
deb-src http://security.ubuntu.com/ubuntu natty-security main restricted
deb http://security.ubuntu.com/ubuntu natty-security universe
deb-src http://security.ubuntu.com/ubuntu natty-security universe
deb http://security.ubuntu.com/ubuntu natty-security multiverse
deb-src http://security.ubuntu.com/ubuntu natty-security multiverse
## Uncomment the following two lines to add software from Canonical's
## 'partner' repository.
## This software is not part of Ubuntu, but is offered by Canonical and the
## respective vendors as a service to Ubuntu users.
deb http://archive.canonical.com/ubuntu natty partner
# deb-src http://archive.canonical.com/ubuntu natty partner
## Uncomment the following two lines to add software from Ubuntu's
## 'extras' repository.
## This software is not part of Ubuntu, but is offered by third-party
## developers who want to ship their latest software.
# deb http://extras.ubuntu.com/ubuntu natty main
# deb-src http://extras.ubuntu.com/ubuntu natty main
Please let me know, how can I solve this.