apt-get RedHat 8 nao Funciona

amigos nao estou conseguindo fazer meu apt-get funcionar..
quando dou o comando apt-get update esta dando error..

[root@Unix-1 apt]# apt-get update
Err http://ayo.freshrpms.net redhat/8.0/i386 release
Could not resolve 'ayo.freshrpms.net'
Err http://ayo.freshrpms.net redhat/8.0/i386/os pkglist
Could not resolve 'ayo.freshrpms.net'
Err http://ayo.freshrpms.net redhat/8.0/i386/os release
Could not resolve 'ayo.freshrpms.net'
Err http://ayo.freshrpms.net redhat/8.0/i386/updates pkglist
Could not resolve 'ayo.freshrpms.net'
Err http://ayo.freshrpms.net redhat/8.0/i386/updates release
Could not resolve 'ayo.freshrpms.net'
Err http://ayo.freshrpms.net redhat/8.0/i386/freshrpms pkglist
Could not resolve 'ayo.freshrpms.net'
Err http://ayo.freshrpms.net redhat/8.0/i386/freshrpms release
Could not resolve 'ayo.freshrpms.net'
Falha ao obter http://ayo.freshrpms.net/redhat/8.0/i386/base/release Could not resolve 'ayo.freshrpms.net'
Falha ao obter http://ayo.freshrpms.net/redhat/8.0/...ase/pkglist.os Could not resolve 'ayo.freshrpms.net'
Falha ao obter http://ayo.freshrpms.net/redhat/8.0/...ase/release.os Could not resolve 'ayo.freshrpms.net'
Falha ao obter http://ayo.freshrpms.net/redhat/8.0/...kglist.updates Could not resolve 'ayo.freshrpms.net'
Falha ao obter http://ayo.freshrpms.net/redhat/8.0/...elease.updates Could not resolve 'ayo.freshrpms.net'
Falha ao obter http://ayo.freshrpms.net/redhat/8.0/...list.freshrpms Could not resolve 'ayo.freshrpms.net'
Falha ao obter http://ayo.freshrpms.net/redhat/8.0/...ease.freshrpms Could not resolve 'ayo.freshrpms.net'
Lendo Listas de Pacotes... Feito
Construindo Árvore de Dependências... Feito
W: Alguns arquivos de release não puderam ser obtidos ou autenticados. Estes repositórios estão sendo ignorados.
W: Você pode querer executar apt-get update para corrigir estes problemas
E: Houve falha no download de alguns arquivos de índice, eles foram ignorados ou os antigos serão usados.
[root@Unix-1 apt]#