redhat下yum命令安裝(替換爲centos yum命令)

redhat默認自帶的yum源須要註冊,才能更新,報錯:
This system is not registered to Red Hat Subscription Management. You can use subscription-manager to register.
可替換爲centos對應的源。 操做以下:


1.檢查是否安裝yum包。查看RHEL是否安裝了yum,如果安裝了,那麼又有哪些yum包:
    rpm -qa |grep yum

2 刪除redhat自帶的yum包
    rpm -qa|grep yum|xargs rpm -e --nodeps(不檢查依賴,直接刪除rpm包)
    rpm -qa |grep yum (查詢確認)
[root@localhost ~]# 

3.下載新的yum包。使用Centos6.5的yum包
    1) 查看版本號和系統類別:
        cat /etc/redhat-release
        arch
    
    2)根據上一步,找到對應的yum包,而後下載。個人服務器對應的爲:
        wget http://mirrors.163.com/centos/6/os/x86_64/Packages/yum-metadata-parser-1.1.2-16.el6.x86_64.rpm
        wget http://mirrors.163.com/centos/6/os/x86_64/Packages/yum-3.2.29-60.el6.centos.noarch.rpm
        wget http://mirrors.163.com/centos/6/os/x86_64/Packages/yum-plugin-fastestmirror-1.1.30-30.el6.noarch.rpm
    
    3)執行:
        rpm -ivh yum-metadata-parser-1.1.2-16.el6.x86_64.rpm yum-3.2.29-60.el6.centos.noarch.rpm yum-plugin-fastestmirror-1.1.30-30.el6.noarch.rpm
        若是這一步報錯,大底以下:
            libc.so.6 is needed by yum-metadata-parser-1.1.2-16.el6.i686
            libc.so.6(GLIBC_2.0) is needed by yum-metadata-parser-1.1.2-16.el6.i686
            libc.so.6(GLIBC_2.1.3) is needed by yum-metadata-parser-1.1.2-16.el6.i686
            libglib-2.0.so.0 is needed by yum-metadata-parser-1.1.2-16.el6.i686
            libpthread.so.0 is needed by yum-metadata-parser-1.1.2-16.el6.i686
            libpython2.6.so.1.0 is needed by yum-metadata-parser-1.1.2-16.el6.i686
            libsqlite3.so.0 is needed by yum-metadata-parser-1.1.2-16.el6.i686
            libxml2.so.2 is needed by yum-metadata-parser-1.1.2-16.el6.i686
            libxml2.so.2(LIBXML2_2.4.30) is needed by yum-metadata-parser-1.1.2-16.el6.i686
        則說明下載安裝的yum包與系統版本不匹配,須要從新下載安裝。另外,163鏡像站點對於6.0~6.5的資源均合併在6的目錄下。
        
    4)更換yum源,將原有源刪除或備份到別的目下下:
        cd /etc/yum.repos.d/
        wget  http://mirrors.163.com/.help/CentOS6-Base-163.repo
        vi CentOS6-Base-163.repo
        編輯文件,把文件裏面的$releasever所有替換爲版本號:6(注意,不是6.5!)最後保存!
    
4.清除原有緩存,重建緩存:
    clean all
    yum makecache
    
5.更新系統:
    yum update
    

參考:
    http://qingwang.blog.51cto.com/505009/1551228
    http://www.th7.cn/system/lin/201402/50472.shtml
    
    
yum包下載:http://mirrors.163.com/centos/6/os/x86_64/Packages/html

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