rhel5.x&rhel6.x，，选用的是网易的源。
#!/bin/sh#authorbythundermeng./etc/init.d/functionsbit=`getconfLONG_BIT`release=`sed-r-n’s/(.*)([[:digit:]])\.([[:digit:]])(.*)/\2/p’/etc/redhat-release`if[$UID-ne0]thenecho”Pleaseuserootexecthisshell”exit1fi[`rpm-qa|grepyum|wc-l`-ge1]&&{rpm-qa|grepyum|xargsrpm-e–nodeps}[-e/tmp/yumupdate]||mkdir/tmp/yumupdatecd/tmp/yumupdaterehl5(){wget-P/etc/yum.repos.d/sed-i”s/\$releasever/5/g”/etc/yum.repos.d/CentOS5-Base-163.repocase$bitin32)wgetrpm-ivhyum-metadata-parser-1.1.2-4.el5.i386.rpm–nodeps;;64)wgetrpm-ivhyum-metadata-parser-1.1.2-4.el5.x86_64.rpm–nodeps;;esacwgetwgetwgetrpm-ivhyum-3.2.22-40.el5.centos.noarch.rpmyum-fastestmirror-1.1.16-21.el5.centos.noarch.rpmrpm-ivhyum-updatesd-0.9-6.el5_10.noarch.rpm}rehl6(){#cdrehl6#cpCentOS-Base.repo/etc/yum.repos.d/wget-P/etc/yum.repos.d/sed-i”s/\$releasever/6/g”/etc/yum.repos.d/CentOS6-Base-163.repowgetrpm-ivhpython-iniparse-0.3.1-2.1.el6.noarch.rpmcase$bitin32)wgetrpm-ivhyum-metadata-parser-1.1.2-16.el6.i686.rpm;;64)wgetrpm-ivhyum-metadata-parser-1.1.2-16.el6.x86_64.rpm;;esacwgetwgetrpm-ivhyum-3.2.29-60.el6.centos.noarch.rpmyum-plugin-fastestmirror-1.1.30-30.el6.noarch.rpm}if[$release-eq6]thenrehl6elif[$release-eq5]thenrehl5elseecho”ThisSystemReleaseNotSupport!”fiif[$?-eq0]thenaction”yumupdateissucessed”/bin/trueelseaction”yumupdateisfailed”/bin/falseexit1firm-rf/tmp/yumupdateyumcleanallyumrepolist
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于千万年之中，于千万人之中，在时间无涯的荒野中，
