1.将iso挂载到路径/mnt/cdiso/：
mount -o loop /home/software/rhel-server-6.0-x86_64-dvd.iso /mnt/cdiso/
yum clean all
2.编辑yum配置文件指向挂载路径：
vi /etc/yum.repos.d/redhat.repo
[Server]
name=Red Hat Enterprise Linux $releasever -$basearch - Server baseurl=file:///mnt/cdiso enabled=1 gpgcheck=0 #gpgkey=file:///etc/pki/rpm-gpg/RPM-GPG-KEY-redhat-release~之后就可以使用yum install XXXX快捷安装了
拓展：Yum编译安装Error Downloading Packages报错
在编译安装FS环境的时候发现如何报错：
yum编译执行命令如下：
yum install ntpdate wget autoconf automakelibtool gcc-c++ zlib-devel libjpeg-devel sqlite-devel libcurl-devel pcre-develspeex-devel libedit-devel openssl-devel libogg-devel libvorbis-devel
报错信息如下：
openssl-devel-1.0.1e-16.el6_5.14.i686:failure: Packages/openssl-devel-1.0.1e-16.el6_5.14.i686.rpm base: [Errno 256] No more mirrors to try.
openssl-devel-1.0.1e-16.el6_5.14.i686:failure: Packages/openssl-devel-1.0.1e-16.el6_5.14.i686.rpm base: [Errno 256] No more mirrors to try.
openssl-devel-1.0.1e-16.el6_5.14.i686:failure: Packages/openssl-devel-1.0.1e-16.el6_5.14.i686.rpm base: [Errno 256] No more mirrors to try.
openssl-devel-1.0.1e-16.el6_5.14.i686:failure: Packages/openssl-devel-1.0.1e-16.el6_5.14.i686.rpm from base: [Errno 256] No more mirrors to try.
解决思路：
1：执行yum clean all 清除缓存目录下的软件包及旧的headers；
2：接着执行 yum list 重新列出所有已经安装和可以安装的软件包；
3：重新执行上述命令，发现yum编译成功；
注意：如果执行 yum list 报错，那就检查一下yum仓库是否有问题；并清除/etc/yum.repos.d/下多余.repo文件！