Eu tive o mesmo problema. RedHat não pode baixar httpd
do repositório. Você precisa configurar o repo CentOs-Base para RedHat.
- Crie um arquivo centos-base.repo com o conteúdo seguinte em
/etc/yum.repos.d
(altere a versão de lançamento deste arquivo, o instantâneo abaixo é para a versão 6)
yum.repos.d
#####################################################################
# CentOS-Base.repo
#
# The mirror system uses the connecting IP address of the client and the
# update status of each mirror to pick mirrors that are updated to and
# geographically close to the client. You should use this for CentOS updates
# unless you are manually picking other mirrors.
#
# If the mirrorlist= does not work for you, as a fall back you can try the
# remarked out baseurl= line instead.
#
#
[base]
name=CentOS-6 - Base
mirrorlist=http://mirrorlist.centos.org/?release=6&arch=$basearch&repo=os
#baseurl=http://mirror.centos.org/centos/6/os/$basearch/
gpgcheck=1
enabled=1
gpgkey=file:///etc/pki/rpm-gpg/RPM-GPG-KEY-CentOS-6
#released updates
[updates]
name=CentOS-6 - Updates
mirrorlist=http://mirrorlist.centos.org/?release=6&arch=$basearch&repo=updates
#baseurl=http://mirror.centos.org/centos/6/updates/$basearch/
gpgcheck=1
gpgkey=file:///etc/pki/rpm-gpg/RPM-GPG-KEY-CentOS-6
#additional packages that may be useful
[extras]
name=CentOS-6 - Extras
mirrorlist=http://mirrorlist.centos.org/?release=6&arch=$basearch&repo=extras
#baseurl=http://mirror.centos.org/centos/6/extras/$basearch/
gpgcheck=1
gpgkey=file:///etc/pki/rpm-gpg/RPM-GPG-KEY-CentOS-6
#additional packages that extend functionality of existing packages
[centosplus]
name=CentOS-6 - Plus
mirrorlist=http://mirrorlist.centos.org/?release=6&arch=$basearch&repo=centosplus
#baseurl=http://mirror.centos.org/centos/6/centosplus/$basearch/
gpgcheck=1
enabled=0
gpgkey=file:///etc/pki/rpm-gpg/RPM-GPG-KEY-CentOS-6
#contrib - packages by Centos Users
[contrib]
name=CentOS-6 - Contrib
mirrorlist=http://mirrorlist.centos.org/?release=6&arch=$basearch&repo=contrib
#baseurl=http://mirror.centos.org/centos/6/contrib/$basearch/
gpgcheck=1
enabled=0
gpgkey=file:///etc/pki/rpm-gpg/RPM-GPG-KEY-CentOS-6
#####################################################################
-
Faça o download da chave gpg para o seu lançamento do sistema operacional do link do site oficial centos e mova-o para /etc/pki/rpm-gpg/
2.1 $ cd / etc / pki / rpm-gpg /
2.2 $ wget link
Importante
Verifique também sua conexão com a internet. Da minha experiência, algum dia o Linux não "vê" a rede com configurações padrão.
Fonte primária
Fonte original aqui