步驟一：安裝epel存儲庫
yum install epel-release -y
步驟二：安裝yum-utils工具
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yum install yum-utils
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步驟三：解析rpm包
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yum install rpmconf
rpmconf -a
package-cleanup --leaves
package-cleanup --orphans
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步驟四：安裝dnf
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yum install dnf -y
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步驟五：刪除軟件包管理器
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dnf remove yum yum-metadata-parser<br>rm -Rf /etc/yum
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步驟六：升級
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dnf upgrade<br>
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步驟七：使用dnf安裝CentOS 8發行包
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dnf -y upgrade http:
//mirror.bytemark.co.uk/centos/8/BaseOS/x86_64/os/Packages/centos-release-8.0-0.1905.0.9.el8.x86_64.rpm
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步驟八：升級EPEL存儲庫
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dnf -y upgrade https:
//dl.fedoraproject.org/pub/epel/epel-release-latest-8.noarch.rpm
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步驟九：成功升級EPEL存儲庫后，請刪除所有臨時文件
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dnf clean all
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步驟十：刪除用於CentOS 7的舊內核內核
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rpm -e `rpm -q kernel`
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步驟十一：刪除有沖突的軟件包
rpm -e --nodeps sysvinit-tools
步驟十二：
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dnf -y --releasever=8 --allowerasing --setopt=deltarpm=
false
distro-sync
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步驟十三：CentOS 8安裝新的內核
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dnf -y install kernel-core
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步驟十四：最后，安裝CentOS 8最小軟件包。
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dnf -y groupupdate
"Core"
"Minimal Install"
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步驟十五：檢查版本
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cat /etc/redhat-release
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