No puedo actualizar paquetes ni instalar nada en Kubuntu

Que tal!!!!!!!!

Hace poco instale kubuntu 8.04, pero no he podido instalar nada ni actualizar los paquetes, he cambiado los servidores, he activado otros repositorios pero aun nada.

Si por ejemplo hago un sudo apt-get update sale lo siguiente:

Err http://archive.canonical.com hardy Release.gpg
Could not resolve 'archive.canonical.com'
Err http://archive.canonical.com hardy/partner Translation-en_US
Could not resolve 'archive.canonical.com'
Err http://ftp.tecnoera.com hardy Release.gpg
Could not resolve 'ftp.tecnoera.com'
Err http://ftp.tecnoera.com hardy/main Translation-en_US
Could not resolve 'ftp.tecnoera.com'
Err http://ftp.tecnoera.com hardy/restricted Translation-en_US
Could not resolve 'ftp.tecnoera.com'
Err http://ftp.tecnoera.com hardy/universe Translation-en_US
Could not resolve 'ftp.tecnoera.com'
Err http://ftp.tecnoera.com hardy/multiverse Translation-en_US
Could not resolve 'ftp.tecnoera.com'
Err http://ftp.tecnoera.com hardy-updates Release.gpg
Could not resolve 'ftp.tecnoera.com'
Err http://ftp.tecnoera.com hardy-updates/main Translation-en_US
Could not resolve 'ftp.tecnoera.com'
Err http://ftp.tecnoera.com hardy-updates/restricted Translation-en_US
Could not resolve 'ftp.tecnoera.com'
Err http://ftp.tecnoera.com hardy-updates/universe Translation-en_US
Could not resolve 'ftp.tecnoera.com'
Err http://ftp.tecnoera.com hardy-updates/multiverse Translation-en_US
Could not resolve 'ftp.tecnoera.com'
Err http://ftp.tecnoera.com hardy-backports Release.gpg
Could not resolve 'ftp.tecnoera.com'
Err http://ftp.tecnoera.com hardy-backports/main Translation-en_US
Could not resolve 'ftp.tecnoera.com'
Err http://ftp.tecnoera.com hardy-backports/restricted Translation-en_US
Could not resolve 'ftp.tecnoera.com'
Err http://ftp.tecnoera.com hardy-backports/universe Translation-en_US
Could not resolve 'ftp.tecnoera.com'
Err http://ftp.tecnoera.com hardy-backports/multiverse Translation-en_US
Could not resolve 'ftp.tecnoera.com'
Err http://ftp.tecnoera.com hardy-security Release.gpg
Could not resolve 'ftp.tecnoera.com'
Err http://ftp.tecnoera.com hardy-security/main Translation-en_US
Could not resolve 'ftp.tecnoera.com'
Err http://ftp.tecnoera.com hardy-security/restricted Translation-en_US
Could not resolve 'ftp.tecnoera.com'
Err http://ftp.tecnoera.com hardy-security/universe Translation-en_US
Could not resolve 'ftp.tecnoera.com'
Err http://ftp.tecnoera.com hardy-security/multiverse Translation-en_US
Could not resolve 'ftp.tecnoera.com'
Reading package lists... Done
W: Failed to fetch http://ftp.tecnoera.com/ubuntu/dists/hardy/Release.gpg Could not resolve 'ftp.tecnoera.com'

W: Failed to fetch http://ftp.tecnoera.com/ubuntu/dists/ha ... -en_US.bz2 Could not resolve 'ftp.tecnoera.com'

W: Failed to fetch http://ftp.tecnoera.com/ubuntu/dists/ha ... -en_US.bz2 Could not resolve 'ftp.tecnoera.com'

W: Failed to fetch http://ftp.tecnoera.com/ubuntu/dists/ha ... -en_US.bz2 Could not resolve 'ftp.tecnoera.com'

W: Failed to fetch http://ftp.tecnoera.com/ubuntu/dists/ha ... -en_US.bz2 Could not resolve 'ftp.tecnoera.com'

W: Failed to fetch http://ftp.tecnoera.com/ubuntu/dists/ha ... elease.gpg Could not resolve 'ftp.tecnoera.com'

W: Failed to fetch http://ftp.tecnoera.com/ubuntu/dists/ha ... -en_US.bz2 Could not resolve 'ftp.tecnoera.com'

W: Failed to fetch http://ftp.tecnoera.com/ubuntu/dists/ha ... -en_US.bz2 Could not resolve 'ftp.tecnoera.com'

W: Failed to fetch http://ftp.tecnoera.com/ubuntu/dists/ha ... -en_US.bz2 Could not resolve 'ftp.tecnoera.com'

W: Failed to fetch http://ftp.tecnoera.com/ubuntu/dists/ha ... -en_US.bz2 Could not resolve 'ftp.tecnoera.com'

W: Failed to fetch http://ftp.tecnoera.com/ubuntu/dists/ha ... elease.gpg Could not resolve 'ftp.tecnoera.com'

W: Failed to fetch http://ftp.tecnoera.com/ubuntu/dists/ha ... -en_US.bz2 Could not resolve 'ftp.tecnoera.com'

W: Failed to fetch http://ftp.tecnoera.com/ubuntu/dists/ha ... -en_US.bz2 Could not resolve 'ftp.tecnoera.com'

W: Failed to fetch http://ftp.tecnoera.com/ubuntu/dists/ha ... -en_US.bz2 Could not resolve 'ftp.tecnoera.com'

W: Failed to fetch http://ftp.tecnoera.com/ubuntu/dists/ha ... -en_US.bz2 Could not resolve 'ftp.tecnoera.com'

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

W: Failed to fetch http://archive.canonical.com/ubuntu/dis ... -en_US.bz2 Could not resolve 'archive.canonical.com'

W: Failed to fetch http://ftp.tecnoera.com/ubuntu/dists/ha ... elease.gpg Could not resolve 'ftp.tecnoera.com'

W: Failed to fetch http://ftp.tecnoera.com/ubuntu/dists/ha ... -en_US.bz2 Could not resolve 'ftp.tecnoera.com'

W: Failed to fetch http://ftp.tecnoera.com/ubuntu/dists/ha ... -en_US.bz2 Could not resolve 'ftp.tecnoera.com'

W: Failed to fetch http://ftp.tecnoera.com/ubuntu/dists/ha ... -en_US.bz2 Could not resolve 'ftp.tecnoera.com'

W: Failed to fetch http://ftp.tecnoera.com/ubuntu/dists/ha ... -en_US.bz2 Could not resolve 'ftp.tecnoera.com'

W: Some index files failed to download, they have been ignored, or old ones used instead.
W: You may want to run apt-get update to correct these problems

Mi computador esta navegando normalmente. Que puedo hacer ?

Muchas gracias.
¿Tienes cortafuegos o te conectas atraves de un equipo que si ?
prueb a cambiar el servidor del gestor de paquetes. en kubuntu no sé dónde estará. en el synaptic de ubuntu está en configuración -> repositorios. si ves que lo tienes en españa, cambialo al otro. a mí me pasó eso mismo hace un tiempo y al hacer eso ya me fue bien.
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