yum是shell前端软件包管理器，是Linux下用来下载安装应用的软件。

\1. 查询原有的yum

[root@orcl~]#rpm-qa|grepyumyum-plugin-fastestmirror-1.1.30-37.el6.noarchyum-metadata-parser-1.1.2-16.el6.i686yum-utils-1.1.30-37.el6.noarchyum-plugin-security-1.1.30-37.el6.noarchyum-3.2.29-75.el6.centos.noarchyum-rhn-plugin-0.9.1-43.el6.noarch

\2. 删除原有的yum

[root@orcl~]#rpm-aq|grepyum|xargsrpm-e–-nodeps[root@orcl~]#rpm-qa|grepyum[root@orcl~]#

\3. 查询原有yum配置

[root@orcl~]#whereisyumyum:/etc/yum[root@orcl~]#rm-fr/etc/yum

\4. 下载需要的安装包 http://mirrors.163.com/centos/6.8/os/i386/Packages/ 系统为32的，所以我选择i386。64的自行查找x86_64。 可以使用

wgethttp://mirrors.163.com/centos/6.8/os/i386/Packages/yum-3.2.29-73.el6.centos.noarch.rpm

下载

yum-3.2.29-73.el6.centos.noarch.rpmyum-plugin-fastestmirror-1.1.30-37.el6.noarch.rpmyum-metadata-parser-1.1.2-16.el6.i686.rpmPython-iniparse-0.3.1-2.1.el6.noarch.rpm

\5. 安装python

[root@orcl~]#rpm-ivhpython-iniparse-….noarch.rpmwarning:python-iniparse-0.4-9.el7.noarch.rpm:HeaderV3RSA/SHA256Signature,keyIDf4a80eb5:NOKEYerror:Faileddependencies:python(abi)=2.7isneededbypython-iniparse-0.4-9.el7.noarch

当前安装版本与服务器不兼容，退后一个版本再试。 查看当前发行版本号

cat/etc/issue遇到的错误

系统位数与安装程序包位数不一致 file /bin/ls

error:Faileddependencies:libc.so.6()(64bit)isneededbyyum-metadata-parser-1.1.2-16.el6.x86_64libc.so.6(GLIBC_2.2.5)(64bit)isneededbyyum-metadata-parser-1.1.2-16.el6.x86_64libglib-2.0.so.0()(64bit)isneededbyyum-metadata-parser-1.1.2-16.el6.x86_64libpthread.so.0()(64bit)isneededbyyum-metadata-parser-1.1.2-16.el6.x86_64libpython2.6.so.1.0()(64bit)isneededbyyum-metadata-parser-1.1.2-16.el6.x86_64libsqlite3.so.0()(64bit)isneededbyyum-metadata-parser-1.1.2-16.el6.x86_64libxml2.so.2()(64bit)isneededbyyum-metadata-parser-1.1.2-16.el6.x86_64libxml2.so.2(LIBXML2_2.4.30)(64bit)isneededbyyum-metadata-parser-1.1.2-16.el6.x86_64

重新下载32位程序包

[root@orcl~]#rpm-ivhpython-iniparse-0.3.1-2.1.el6.noarch.rpmPreparing…###########################################[100%]packagepython-iniparse-0.3.1-2.1.el6.noarchisalreadyinstalled[root@orcl~]#rpm-ivhyum-metadata-parser-1.1.2-16.el6.i686.rpmPreparing…###########################################[100%]1:yum-metadata-parser###########################################[100%][root@orcl~]#rpm-ivhyum-3.2.29-73.el6.centos.noarch.rpmyum-plugin-fastestmirror-1.1.30-37.el6.noarch.rpmPreparing…###########################################[100%]1:yum-plugin-fastestmirro###########################################[50%]2:yum###########################################[100%][root@orcl~]#

注意最后两个包必需同时安装，否则会相互依赖 更改yum源（使用网易的CentOS镜像源）

[root@localhostyum]#cd/etc/yum.repos.d/[root@localhostyum.repos.d]#rm-rf*[root@localhostyum.repos.d]#wgethttp://mirrors.163.com/.help/CentOS6-Base-163.repo[root@localhostyum.repos.d]#viCentOS6-Base-163.repo

将所有 $releasever 修改为具体的版本号，我这里写的是6.8，这个自己打开（http://mirrors.163.com/centos）找一下就可以。

#CentOS-Base.repo##ThemirrorsystemusestheconnectingIPaddressoftheclientandthe#updatestatusofeachmirrortopickmirrorsthatareupdatedtoand#geographicallyclosetotheclient.YoushouldusethisforCentOSupdates#unlessyouaremanuallypickingothermirrors.##Ifthemirrorlist=doesnotworkforyou,asafallbackyoucantrythe#remarkedoutbaseurl=lineinstead.##[base]name=CentOS-$releasever-Base-163.combaseurl=http://mirrors.163.com/centos/6.8/os/$basearch/#mirrorlist=http://mirrorlist.centos.org/?release=$releasever&arch=$basearch&repo=osgpgcheck=1gpgkey=http://mirror.centos.org/centos/RPM-GPG-KEY-CentOS-6#releasedupdates[updates]name=CentOS-$releasever-Updates-163.combaseurl=http://mirrors.163.com/centos/6.8/updates/$basearch/#mirrorlist=http://mirrorlist.centos.org/?release=$releasever&arch=$basearch&repo=updatesgpgcheck=1gpgkey=http://mirror.centos.org/centos/RPM-GPG-KEY-CentOS-6#additionalpackagesthatmaybeuseful[extras]name=CentOS-$releasever-Extras-163.combaseurl=http://mirrors.163.com/centos/6.8/extras/$basearch/#mirrorlist=http://mirrorlist.centos.org/?release=$releasever&arch=$basearch&repo=extrasgpgcheck=1gpgkey=http://mirror.centos.org/centos/RPM-GPG-KEY-CentOS-6#additionalpackagesthatextendfunctionalityofexistingpackages[centosplus]name=CentOS-$releasever-Plus-163.combaseurl=http://mirrors.163.com/centos/6.8/centosplus/$basearch/#mirrorlist=http://mirrorlist.centos.org/?release=$releasever&arch=$basearch&repo=centosplusgpgcheck=1enabled=0gpgkey=http://mirror.centos.org/centos/RPM-GPG-KEY-CentOS-6#contrib-packagesbyCentosUsers[contrib]name=CentOS-$releasever-Contrib-163.combaseurl=http://mirrors.163.com/centos/6.8/contrib/$basearch/#mirrorlist=http://mirrorlist.centos.org/?release=$releasever&arch=$basearch&repo=contribgpgcheck=1enabled=0gpgkey=http://mirror.centos.org/centos/RPM-GPG-KEY-CentOS-6

清理yum缓存

yumcleanall

显示已安程序包及可安程序包

yumlist

可以按要求更新程序包或安装

yumupdate/yuminstall包名