CentOS-Base.repo 是yum 网络源的配置文件,CentOS-Media.repo 是yum 本地源的配置文件
禁用默认的yum
网络源,将yum 网络源配置文件改名为CentOS-Base.repo.bak，否则会先在网络源中寻找适合的包，改名之后直接从本地源读取。
##挂载并修改repo文件
mkdir /mnt/yum_source/ mount -o rw,remount /export/jiangxu/CentOS-6.3-x86_64-bin-DVD1.iso /mnt/yum_source -o loop ##挂载并可读写 echo " [software] name=software baseurl=file:///mnt/yum_source gpgcheck=1 enabled=1 gpgkey=file:///etc/pki/rpm-gpg/RPM-GPG-KEY-CentOS-6" > /etc/yum.repos.d/yumsource_local.repo echo " # CentOS-Media.repo # # This repo is used to mount the default locations for a CDROM / DVD on # CentOS-6. You can use this repo and yum to install items directly off the # DVD ISO that we release. # # To use this repo, put in your DVD and use it with the other repos too: # yum --enablerepo=c6-media [command] # # or for ONLY the media repo, do this: # # yum --disablerepo=\* --enablerepo=c6-media [command] [c6-media] name=CentOS-$releasever - Media #baseurl=file:///media/CentOS/ # file:///media/cdrom/ # file:///media/cdrecorder/ gpgcheck=1 enabled=1 gpgkey=file:///etc/pki/rpm-gpg/RPM-GPG-KEY-CentOS-6 baseurl=file:///mnt/yum_source" > /etc/yum.repos.d/CentOS-Media.repo
##清缓存并测试
yum clean all yum install -y dos2unix
原文：http://www.cnblogs.com/jiangxu67/p/3672628.html
