centos命令yum install软件包时出现No package * available 解决

centos6  64位

wget http://dl.fedoraproject.org/pub/epel/6/x86_64/epel-release-6-8.noarch.rpm

yum install epel-release-6-8.noarch.rpm

centos6  32位

wget http://dl.fedoraproject.org/pub/epel/6/i386/epel-release-6-8.noarch.rpm

yum install epel-release-6-8.noarch.rpm

centos7 64位

wget https://dl.fedoraproject.org/pub/epel/epel-release-latest-7.noarch.rpm

yum install epel-release-latest-7.noarch.rpm