把光盘加载到本地 [root@localhost CentOS]# mount /dev/cdrom /media 在/etc/yum.repos.d/目录下，有两个文件 CentOS-Base.repo和CentOS-Media.repo 其中CentOS-Base.repo记录着网络上的yum源的地址和路径信息等 CentOS-Media.repo记录着可以从本地作为yum源的介质和路径。其中还有这样一个说明： # CentOS-Media.repo # # This repo is used to mount the default locations for a CDROM / DVD on # CentOS-5. 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=c5-media [command] # # or for ONLY the media repo, do this: # # yum --disablerepo=\* --enablerepo=c5-media [command] [c5-media] name=CentOS-$releasever - Media baseurl=file:///media/CentOS/ file:///media/cdrom/ file:///media/cdrecorder/ file:///media/ #增加这句 gpgcheck=1 enabled=0 gpgkey=file:///etc/pki/rpm-gpg/RPM-GPG-KEY-beta 觉得自己的光盘的源足够用了。不需要网络源，或者没有网络。 可以使用yum --disablerepo=\* --enablerepo=c5-media [command] 但是使用命令时如果这样 [root@centos yum.repos.d]# yum --enablerepo=c5-media Loading "installonlyn" plugin You need to give some command 这不是一个完整的命令，须在后面加上要执行的命令。这部分只是告诉你这条yum命令允许使用本地media介质的源而已。正确的命令如下： [root@centos cdrom]# yum --disablerepo=* --enablerepo=c5-media update Loading "installonlyn" plugin Setting up Update Process Setting up repositories c5-media 100% |=========================| 1.1 kB 00:00 Reading repository metadata in from local files primary.xml.gz 100% |=========================| 834 kB 00:00 ################################################## 2400/2400 No Packages marked for Update/Obsoletion 比如安装gdb [root@centos cdrom]# yum --disablerepo=* --enablerepo=c5-media install gdb Loading "installonlyn" plugin Setting up Install Process Setting up repositories Reading repository metadata in from local files Parsing package install arguments Resolving Dependencies --> Populating transaction set with selected packages. Please wait. ---> Downloading header for gdb to pack into transaction set. gdb-6.5-25.el5.i386.rpm 100% |=========================| 56 kB 00:00 ---> Package gdb.i386 0:6.5-25.el5 set to be updated --> Running transaction check Dependencies Resolved ============================================================================= Package Arch Version Repository Size ============================================================================= Installing: gdb i386 6.5-25.el5 c5-media 3.1 M Transaction Summary ============================================================================= Install 1 Package(s) Update 0 Package(s) Remove 0 Package(s) Total download size: 3.1 M Is this ok [y/N]: y Downloading Packages: Running Transaction Test Finished Transaction Test Transaction Test Succeeded Running Transaction Installing: gdb ######################### [1/1] Installed: gdb.i386 0:6.5-25.el5 Complete! [root@centos cdrom]# 在使用yum进行install时，经常会出现下面的错误 warning: rpmts_HdrFromFdno: Header V3 DSA signature: NOKEY, key ID 1ac70ce6 导致安装不能进行。解决方法如下： [root@localhost CentOS]# rpm --import /etc/pki/rpm-gpg/RPM-GPG-KEY-CentOS-5 [root@localhost CentOS]# rpm --import /etc/pki/rpm-gpg/RPM-GPG-KEY-beta