Ubuntu 12.04 LTS

ubuntu

root@ubuntu:~# apt-get update
Err http://ppa.launchpad.net precise InRelease

Err http://archive.ubuntu.com precise InRelease

Err http://archive.ubuntu.com precise-updates InRelease

Err http://archive.ubuntu.com precise-backports InRelease

Err http://security.ubuntu.com precise-security InRelease

Err http://archive.canonical.com precise InRelease

Err http://ppa.launchpad.net precise Release.gpg
  Temporary failure resolving 'ppa.launchpad.net'
Err http://extras.ubuntu.com precise InRelease

Err http://archive.ubuntu.com precise Release.gpg
  Temporary failure resolving 'archive.ubuntu.com'
Err http://security.ubuntu.com precise-security Release.gpg
  Temporary failure resolving 'security.ubuntu.com'
Err http://archive.canonical.com precise Release.gpg
  Temporary failure resolving 'archive.canonical.com'
Err http://extras.ubuntu.com precise Release.gpg
  Temporary failure resolving 'extras.ubuntu.com'
Err http://archive.ubuntu.com precise-updates Release.gpg
  Temporary failure resolving 'archive.ubuntu.com'
Err http://archive.ubuntu.com precise-backports Release.gpg
  Temporary failure resolving 'archive.ubuntu.com'
Reading package lists... Done
W: Failed to fetch http://archive.ubuntu.com/ubuntu/dists/precise/InRelease

W: Failed to fetch http://archive.ubuntu.com/ubuntu/dists/precise-updates/InRelease

W: Failed to fetch http://archive.ubuntu.com/ubuntu/dists/precise-backports/InRelease

W: Failed to fetch http://security.ubuntu.com/ubuntu/dists/precise-security/InRelease

W: Failed to fetch http://archive.canonical.com/ubuntu/dists/precise/InRelease

W: Failed to fetch http://extras.ubuntu.com/ubuntu/dists/precise/InRelease

W: Failed to fetch http://ppa.launchpad.net/ubuntugis/ubuntugis-unstable/ubuntu/dists/precise/InRelease

W: Failed to fetch http://ppa.launchpad.net/ubuntugis/ubuntugis-unstable/ubuntu/dists/precise/Release.gpg  Temporary failure resolving 'ppa.launchpad.net'

W: Failed to fetch http://archive.ubuntu.com/ubuntu/dists/precise/Release.gpg  Temporary failure resolving 'archive.ubuntu.com'

W: Failed to fetch http://archive.ubuntu.com/ubuntu/dists/precise-updates/Release.gpg  Temporary failure resolving 'archive.ubuntu.com'

W: Failed to fetch http://archive.ubuntu.com/ubuntu/dists/precise-backports/Release.gpg  Temporary failure resolving 'archive.ubuntu.com'

W: Failed to fetch http://security.ubuntu.com/ubuntu/dists/precise-security/Release.gpg  Temporary failure resolving 'security.ubuntu.com'

W: Failed to fetch http://archive.canonical.com/ubuntu/dists/precise/Release.gpg  Temporary failure resolving 'archive.canonical.com'

W: Failed to fetch http://extras.ubuntu.com/ubuntu/dists/precise/Release.gpg  Temporary failure resolving 'extras.ubuntu.com'

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