How to update/upgrade the 13.04 daily builds

[levomac]

Hi,
Please tell me the method to update/upgrade the daily build as there are no software sources and adding any repository ends with an error .
Is there some other command to add package lists or do we need to add quantal sources ? if yes then how??!!
Please advise,
thanks.
What's the 'W' here,W is not my copm or account name
here's the result of apt-get update
sudo apt-get update

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

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

Err http://archive.canonical.com raring Release.gpg
Could not resolve 'archive.canonical.com'
Err http://archive.canonical.com raring Release.gpg
Could not resolve 'archive.canonical.com'
Err http://extras.ubuntu.com raring InRelease

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

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

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

Err http://archive.ubuntu.com raring-security InRelease

Err http://archive.ubuntu.com raring-proposed InRelease

Err http://extras.ubuntu.com raring Release.gpg
Could not resolve 'extras.ubuntu.com'
Err http://archive.ubuntu.com raring Release.gpg
Could not resolve 'archive.ubuntu.com'
Err http://archive.ubuntu.com raring-updates Release.gpg
Could not resolve 'archive.ubuntu.com'
Err http://archive.ubuntu.com raring-backports Release.gpg
Could not resolve 'archive.ubuntu.com'
Err http://archive.ubuntu.com raring-security Release.gpg
Could not resolve 'archive.ubuntu.com'
Err http://archive.ubuntu.com raring-proposed Release.gpg
Could not resolve 'archive.ubuntu.com'
Reading package lists... Done
W: Failed to fetch http://archive.ubuntu.com/ubuntu/dists/raring/InRelease

W: Failed to fetch http://archive.ubuntu.com/ubuntu/dis...ates/InRelease

W: Failed to fetch http://archive.ubuntu.com/ubuntu/dis...orts/InRelease

W: Failed to fetch http://archive.ubuntu.com/ubuntu/dis...rity/InRelease

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

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

W: Failed to fetch http://archive.ubuntu.com/ubuntu/dis...osed/InRelease

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

W: Failed to fetch http://archive.canonical.com/ubuntu/...ng/Release.gpg Could not resolve 'archive.canonical.com'

W: Failed to fetch http://archive.canonical.com/dists/raring/Release.gpg Could not resolve 'archive.canonical.com'

W: Failed to fetch http://extras.ubuntu.com/ubuntu/dist...ng/Release.gpg Could not resolve 'extras.ubuntu.com'

W: Failed to fetch http://archive.ubuntu.com/ubuntu/dis...ng/Release.gpg Could not resolve 'archive.ubuntu.com'

W: Failed to fetch http://archive.ubuntu.com/ubuntu/dis...es/Release.gpg Could not resolve 'archive.ubuntu.com'

W: Failed to fetch http://archive.ubuntu.com/ubuntu/dis...ts/Release.gpg Could not resolve 'archive.ubuntu.com'

W: Failed to fetch http://archive.ubuntu.com/ubuntu/dis...ty/Release.gpg Could not resolve 'archive.ubuntu.com'

W: Failed to fetch http://archive.ubuntu.com/ubuntu/dis...ed/Release.gpg Could not resolve 'archive.ubuntu.com'

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