centos7--(2)卸载和安装yum包

1、centos版本

CentOS Linux release 7.5.1804 (Core)

2、卸载原来的yum

[[email protected] 下载]# rpm -qa|grep yum
yum-3.4.3-158.el7.centos.noarch
yum-utils-1.1.31-45.el7.noarch
PackageKit-yum-1.1.5-1.el7.centos.x86_64
yum-langpacks-0.4.2-7.el7.noarch
yum-metadata-parser-1.1.4-10.el7.x86_64
yum-plugin-fastestmirror-1.1.31-45.el7.noarch
[[email protected] 下载]# rpm -e --nodeps yum-3.4.3-158.el7.centos.noarch
[[email protected] 下载]# rpm -e --nodeps yum-utils-1.1.31-45.el7.noarch
[[email protected] 下载]# rpm -e --nodeps PackageKit-yum-1.1.5-1.el7.centos.x86_64
[[email protected] 下载]# rpm -e --nodeps yum-langpacks-0.4.2-7.el7.noarch
警告：/etc/yum/pluginconf.d/langpacks.conf 已另存为 /etc/yum/pluginconf.d/langpacks.conf.rpmsave
[[email protected] 下载]# rpm -e --nodeps yum-langpacks-0.4.2-7.el7.noarch
错误：未安装软件包 yum-langpacks-0.4.2-7.el7.noarch
[[email protected] 下载]# rpm -e --nodeps yum-metadata-parser-1.1.4-10.el7.x86_64
[[email protected] 下载]# rpm -e --nodeps yum-plugin-fastestmirror-1.1.31-45.el7.noarch
[[email protected] 下载]# rpm -qa|grep yum
[[email protected] 下载]# mkdir /tmp/yum-packages
[[email protected] 下载]# cd /tmp/yum-packages/

3、从华为云下载yum的包

wget https://mirrors.huaweicloud.com/centos/7.5.1804/os/x86_64/Packages/python-iniparse-0.4-9.el7.noarch.rpm

wget https://mirrors.huaweicloud.com/centos/7.5.1804/os/x86_64/Packages/python-urlgrabber-3.10-8.el7.noarch.rpm

wget https://mirrors.huaweicloud.com/centos/7.5.1804/os/x86_64/Packages/yum-3.4.3-158.el7.centos.noarch.rpm

wget https://mirrors.huaweicloud.com/centos/7.5.1804/os/x86_64/Packages/yum-metadata-parser-1.1.4-10.el7.x86_64.rpm

wget https://mirrors.huaweicloud.com/centos/7.5.1804/os/x86_64/Packages/yum-plugin-fastestmirror-1.1.31-45.el7.noarch.rpm

4、下载到当前包后

rpm -ivh --force --nodeps *.rpm

--force 强制安装 --nodeps 覆盖安装

5、安装完毕后

备份配置文件：cp -a /etc/yum.repos.d/CentOS-Base.repo /etc/yum.repos.d/CentOS-Base.repo.bak

修改CentOS-Base.repo文件，取消baseurl开头的行的注释，并增加mirrorlist开头的行的注释。将文件中的http://mirror.centos.org替换成https://mirrors.huaweicloud.com，可以参考如下命令：

sed -i "s/#baseurl/baseurl/g" /etc/yum.repos.d/CentOS-Base.repo
sed -i "s/mirrorlist=http/#mirrorlist=http/g" /etc/yum.repos.d/CentOS-Base.repo
sed -i "[email protected]://[email protected]://[email protected]" /etc/yum.repos.d/CentOS-Base.repo

执行yum clean all；yum makecache生成缓存

遇到的问题：

File contains no section headers.
file: file:///etc/yum.repos.d/google-chrome.repo, line: 2
'ogle-chrome]\n'

打开google-chrome.repo缺少一个“[”符号