Centos7.6如何升级为Centos8

1.输入该命令按回车键：yum -y install epel-release



2.输入该命令按回车键：yum -y install rpmconf yum-utils



3.输入该命令按回车键：rpmconf -a，出现提示输入Y按回车键



4.输入该命令按回车键：yum -y install dnf



5.输入该命令按回车键：dnf -y remove yum yum-metadata-parser



6.输入该命令按回车键：rm -rf /etc/yum



7.输入该命令按回车键：dnf -y upgrade



8.输入该命令按回车键：dnf -y install https://mirrors.aliyun.com/centos/8/BaseOS/x86_64/os/Packages/{centos-linux-repos-8-3.el8.noarch.rpm,centos-linux-release-8.5-1.2111.el8.noarch.rpm,centos-gpg-keys-8-3.el8.noarch.rpm}


9.输入该命令按回车键dnf -y upgrade https://mirrors.bfsu.edu.cn/epel/epel-release-latest-8.noarch.rpm


10.输入该命令按回车键：dnf clean all



11.输入该命令按回车键：rpm -e `rpm -q kernel`


12.输入该命令按回车键：rpm -e --nodeps sysvinit-tools



13.输入该命令按回车键：dnf -y --releasever=8 --allowerasing --setopt=deltarpm=false distro-sync


14.输入该命令按回车键查看版本：cat /etc/redhat-release