Le problème est que quand je lance up2date, il lance yum comme ceci:
yum channel fedora-core-1 from
http://download.fedora.redhat.com/pub/fedora/linux/core/1/i386/os/
yum channel updates-released from
http://download.fedora.redhat.com/pub/fedora/linux/core/updates/1/i386/