环境 vmware + centos5.7
目录 /data/Centos/i386/1、挂载文件
mkdir -p /mnt/soft mount -o loop -t iso9660 /dev/cdrom /mnt/soft cd /data/Centos/i386/2.新建一个自定义的目录，用来放置你的RPM包，并复制一份。
mkdir -p /data/Centos/i386/ cp -rf /mnt/soft/CentOS/ /data/CentOS/i386/ 3.将/mnt/soft下的repodata/ 拷贝到/data/Centos/i386/CentOS下 cp -rf /mnt/soft/repodata/ /data/Centos/i386/CentOS/ 4.安装rpm -ivh /mnt/soft/CentOS/createrepo-0.4.11-3.el5.noarch.rpm （此包是用来安装服务端设置软件仓库及信息文件）5.生成客户端所需的信息文件
createrepo -g /mnt/soft/repodata/comps.xml /data/Centos/i386/ 6.将key文件（用于客户端与服务端的认证）拷入指定目录/data/Centos/i386 下 cp /mnt/soft/RPM-GPG-KEY-CentOS-5 /data/Centos/i386/7.更改yum的配置文件，更改之前CentOS-Base.repo要做好备份
vim CentOS-Base.repo [base] name=CentOS5.7-base baseurl=file:///data/Centos/i386/ enable=1 gpgcheck=1 gpgkey=file:///data/Centos/i386/RPM-GPG-KEY-CentOS-5先执行下yum clean all
验证结果 [root@lx_web_s1 CentOS]# yum install zlib Loaded plugins: fastestmirror Loading mirror speeds from cached hostfile Setting up Install Process Resolving Dependencies --> Running transaction check ---> Package zlib.i386 0:1.2.3-4.el5 set to be updated --> Finished Dependency ResolutionDependencies Resolved
================================================================================
Package Arch Version Repository Size ================================================================================ Updating: zlib i386 1.2.3-4.el5 base 51 kTransaction Summary
================================================================================ Install 0 Package(s) Update 1 Package(s) Remove 0 Package(s)Total download size: 51 k
Is this ok [y/N]: y Downloading Packages: Running rpm_check_debug Running Transaction Test Finished Transaction Test Transaction Test Succeeded Running Transaction Updating : zlib 1/2 Cleanup : zlib 2/2Updated:
zlib.i386 0:1.2.3-4.el5Complete!
这样安装/升级软件比网络源快很多。