Centos 7.9升级至Centos 8.4

Question

我有系统，是CentOS7.9，但内核集已经升级到5.4.154(非官方版本)以前。现在我想把我的机器升级到8.4。我怎么能做到呢？我尝试了很多方法。但在某些方面是有错误的。

Answer 1

yum install epel-release -y
yum install yum-utils
# yum install rpmconf
# rpmconf -a
# package-cleanup --leaves
# package-cleanup --orphans
# yum install dnf
# dnf -y remove yum yum-metadata-parser
# rm -Rf /etc/yum
# dnf upgrade
# dnf install http://mirror.centos.org/centos/8/BaseOS/x86_64/os/Packages/centos-linux-repos-8-2.el8.noarch.rpm http://mirror.centos.org/centos/8/BaseOS/x86_64/os/Packages/centos-linux-release-8.3-1.2011.el8.noarch.rpm http://mirror.centos.org/centos/8/BaseOS/x86_64/os/Packages/centos-gpg-keys-8-2.el8.noarch.rpm

# dnf clean all

# rpm -e `rpm -q kernel`

# rpm -e --nodeps sysvinit-tools

# dnf -y --releasever=8 --allowerasing --setopt=deltarpm=false distro-sync

# dnf -y install kernel-core

# dnf -y groupupdate "Core" "Minimal Install"