Centos7 系统下yum的卸载与重新安装

左手的ㄟ右手 2024-04-17 06:02 88阅读 0赞

操作系统版本：centos7

[root@linux-node3 ~]# uname -r
    3.10.0-514.el7.x86_64

**一、将现有的yum源卸载**

[root@linux-node3 ~]# rpm -qa yum
    yum-3.4.3-150.el7.centos.noarch
    [root@linux-node3 ~]# rpm -qa | grep yum | xargs rpm -e --nodeps #这一步一定要执行，而且要将所有的组件卸载掉，如果卸载不干净，后面安装会有问题
    [root@linux-node3 ~]# rpm -qa yum

![这里写图片描述][SouthEast]

**二、从centos官网上下载和yum有关的rpm包**

1、下载rpm包

[root@linux-node3 ~]# wget http://mirror.centos.org/centos/7/os/x86_64/Packages/yum-3.4.3-150.el7.centos.noarch.rpm
    [root@linux-node3 ~]# wget http://mirror.centos.org/centos/7/os/x86_64/Packages/yum-metadata-parser-1.1.4-10.el7.x86_64.rpm
    [root@linux-node3 ~]# wget http://mirror.centos.org/centos/7/os/x86_64/Packages/yum-plugin-fastestmirror-1.1.31-40.el7.noarch.rpm

备注：如果是centos6，应下载以下rpm包

http://mirror.centos.org/centos/6/os/x86_64/Packages/yum-3.2.29-81.el6.centos.noarch.rpm
    http://mirror.centos.org/centos/6/os/x86_64/Packages/yum-metadata-parser-1.1.2-16.el6.x86_64.rpm
    http://mirror.centos.org/centos/6/os/x86_64/Packages/yum-plugin-fastestmirror-1.1.30-40.el6.noarch.rpm

2、安装

[root@linux-node3 ~]# ls 
    yum-3.4.3-150.el7.centos.noarch.rpm
    yum-metadata-parser-1.1.4-10.el7.x86_64.rpm
    yum-plugin-fastestmirror-1.1.31-40.el7.noarch.rpm
    
    [root@linux-node3 ~]# rpm -ivh yum-* #安装
    
    [root@linux-node3 ~]# rpm -qa yum #查看是否已经安装上
    yum-3.4.3-150.el7.centos.noarch.rpm

![这里写图片描述][SouthEast 1]

**三、检测安装的yum是否有问题，执行命令进行测试**  
![这里写图片描述][SouthEast 2]

备注：  
1、不同的操作系统版本，要从官网上下载不同的rpm包，官网地址”[http://mirror.centos.org/centos/][http_mirror.centos.org_centos]“，然后根据自己操作系统的版本选择即可。  
2、如果出现安装好以后，yum还是不能用的情况，那肯是是原有的yum没有删除干净，再次执行以下命令，重新安装yum即可。

rpm -qa|grep yum|xargs rpm -e --nodeps

3、如果有需要导入证书的情况，请从官网上找到链接，导入即可

rpm --import http://mirror.centos.org/centos/RPM-GPG-KEY-CentOS-7

[SouthEast]: https://img-blog.csdn.net/20170712132106780?watermark/2/text/aHR0cDovL2Jsb2cuY3Nkbi5uZXQvbTBfMzc4ODY0Mjk=/font/5a6L5L2T/fontsize/400/fill/I0JBQkFCMA==/dissolve/70/gravity/SouthEast
[SouthEast 1]: https://img-blog.csdn.net/20170712132936222?watermark/2/text/aHR0cDovL2Jsb2cuY3Nkbi5uZXQvbTBfMzc4ODY0Mjk=/font/5a6L5L2T/fontsize/400/fill/I0JBQkFCMA==/dissolve/70/gravity/SouthEast
[SouthEast 2]: https://img-blog.csdn.net/20170712133247495?watermark/2/text/aHR0cDovL2Jsb2cuY3Nkbi5uZXQvbTBfMzc4ODY0Mjk=/font/5a6L5L2T/fontsize/400/fill/I0JBQkFCMA==/dissolve/70/gravity/SouthEast
[http_mirror.centos.org_centos]: http://mirror.centos.org/centos/