Err http://security.ubuntu.com lucid-security Release.gpg
  Temporary failure resolving 'security.ubuntu.com'
Err http://us.archive.ubuntu.com lucid Release.gpg
  Temporary failure resolving 'us.archive.ubuntu.com'
Err http://security.ubuntu.com/ubuntu/ lucid-security/main Translation-en_US
  Temporary failure resolving 'security.ubuntu.com'
Err http://us.archive.ubuntu.com/ubuntu/ lucid/main Translation-en_US
  Temporary failure resolving 'us.archive.ubuntu.com'
Err http://security.ubuntu.com/ubuntu/ lucid-security/restricted Translation-en_US
  Temporary failure resolving 'security.ubuntu.com'
Err http://us.archive.ubuntu.com/ubuntu/ lucid/restricted Translation-en_US
  Temporary failure resolving 'us.archive.ubuntu.com'
Err http://us.archive.ubuntu.com/ubuntu/ lucid/universe Translation-en_US
  Temporary failure resolving 'us.archive.ubuntu.com'
Err http://security.ubuntu.com/ubuntu/ lucid-security/universe Translation-en_US
  Temporary failure resolving 'security.ubuntu.com'
0% [Connecting to us.archive.ubuntu.com] [Connecting to security.ubuntu.com]