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Backgroud:
The little difference between CentOS series and Red Hat releases ...
1:Test Environment
[root@xilong ~]# cat /etc/os-release
NAME="Red Hat Enterprise Linux Server"
VERSION="7.5 (Maipo)"
PRETTY_NAME="Red Hat Enterprise Linux Server 7.5 (Maipo)"
[root@xilong ~]# uname -r
3.10.0-862.el7.x86_64
2:Delete Installed Yum Packages
[root@xilong ~]# rpm -qa |grep yum
yum-metadata-parser-1.1.4-10.el7.x86_64
yum-rhn-plugin-2.0.1-10.el7.noarch
yum-3.4.3-158.el7.noarch
yum-langpacks-0.4.2-7.el7.noarch
PackageKit-yum-1.1.5-1.el7.x86_64
yum-utils-1.1.31-45.el7.noarch
[root@xilong ~]# rpm -qa | grep yum | xargs rpm -e --nodeps
warning: /etc/yum/pluginconf.d/langpacks.conf saved as /etc/yum/pluginconf.d/langpacks.conf.rpmsave
[root@xilong ~]# rpm -qa |grep yum
3:Download Related Yum Packages
1 [root@xilong ~]# mkdir -p /server/packages
2 [root@xilong ~]# cd /server/packages/
3
4 wget http://mirrors.163.com/centos/7.5.1804/os/x86_64/Packages/python-iniparse-0.4-9.el7.noarch.rpm
5 wget http://mirrors.163.com/centos/7.5.1804/os/x86_64/Packages/yum-metadata-parser-1.1.4-10.el7.x86_64.rpm
6 wget http://mirrors.163.com/centos/7.5.1804/os/x86_64/Packages/yum-3.4.3-158.el7.centos.noarch.rpm
7 wget http://mirrors.163.com/centos/7.5.1804/os/x86_64/Packages/yum-plugin-fastestmirror-1.1.31-45.el7.noarch.rpm
8 [root@xilong packages]# ls -l
9 total 1368
10 -rw-r--r--. 1 root root 39800 Jul 4 2014 python-iniparse-0.4-9.el7.noarch.rpm
11 -rw-r--r--. 1 root root 1292216 Apr 25 19:52 yum-3.4.3-158.el7.centos.noarch.rpm
12 -rw-r--r--. 1 root root 28348 Jul 4 2014 yum-metadata-parser-1.1.4-10.el7.x86_64.rpm
13 -rw-r--r--. 1 root root 33660 Apr 25 19:52 yum-plugin-fastestmirror-1.1.31-45.el7.noarch.rpm
15 [root@xilong packages]# rpm -ivh yum*
17 [root@xilong packages]# rpm -ivh python-iniparse-0.4-9.el7.noarch.rpm
4:Download and Configure CentOS-Base
1 [root@xilong ~]# cd /etc/yum.repos.d/ 2 [root@xilong yum.repos.d]# ls redhat.repo 4 [root@xilong yum.repos.d]# wget http://mirrors.163.com/.help/CentOS7-Base-163.repo 6 [root@xilong yum.repos.d]# sed 's#$releasever#7.5.1804#g' CentOS7-Base-163.repo 7 [root@xilong yum.repos.d]# sed 's#$releasever#7.5.1804#g' CentOS7-Base-163.repo -i
##[root@xilong yum.repos.d]# sed 's#163#aliyun#g' CentOS7-Base-163.repo -i
5:Work Finished
1 [root@xilong ~]# yum makecache
6:Update Yum
1 [root@xilong ~]# yum update -y
7: Add epel Source
1 [root@xilong yum.repos.d]# wget -O /etc/yum.repos.d/epel.repo http://mirrors.aliyun.com/repo/epel-7.repo
8:Download some Softwares You may Need for Monitoring
1 [root@xilong ~]# yum -y install glances htop
If you have any further questions, please feel free to send an E-mail to xilong_devops@163.com;