Centos7.6如何升级为Centos8-文档中心-青果网络

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

![img](https://public-1251015552.cos.ap-guangzhou.myqcloud.com/Uploads/image/2023-09-19/1117088ed270a.jpeg)

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

![img](https://public-1251015552.cos.ap-guangzhou.myqcloud.com/Uploads/image/2023-09-19/111710ee56daf.jpeg)

3.输入该命令按回车键：`rpmconf -a`，出现提示输入`Y`按回车键

![img](https://public-1251015552.cos.ap-guangzhou.myqcloud.com/Uploads/image/2023-09-19/111712cae3edd.jpeg)

4.输入该命令按回车键：`yum -y install dnf`

![img](https://public-1251015552.cos.ap-guangzhou.myqcloud.com/Uploads/image/2023-09-19/111714338cbb1.jpeg)

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

![img](https://public-1251015552.cos.ap-guangzhou.myqcloud.com/Uploads/image/2023-09-19/1117176349862.jpeg)

6.输入该命令按回车键：`rm -rf /etc/yum`

![img](https://public-1251015552.cos.ap-guangzhou.myqcloud.com/Uploads/image/2023-09-19/11172060017c5.jpeg)

7.输入该命令按回车键：`dnf -y upgrade`

![img](https://public-1251015552.cos.ap-guangzhou.myqcloud.com/Uploads/image/2023-09-19/111722091fa46.jpeg)

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}

![img](https://public-1251015552.cos.ap-guangzhou.myqcloud.com/Uploads/image/2023-09-19/111724ed4f120.jpeg)

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

![img](https://public-1251015552.cos.ap-guangzhou.myqcloud.com/Uploads/image/2023-09-19/1117268e79f89.jpeg)

10.输入该命令按回车键：`dnf clean all`

![img](https://public-1251015552.cos.ap-guangzhou.myqcloud.com/Uploads/image/2023-09-19/11172892e7b47.jpeg)

11.输入该命令按回车键：

rpm -e `rpm -q kernel`

![img](https://public-1251015552.cos.ap-guangzhou.myqcloud.com/Uploads/image/2023-09-19/111730221cca6.jpeg)

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

![img](https://public-1251015552.cos.ap-guangzhou.myqcloud.com/Uploads/image/2023-09-19/11173353dd6e4.jpeg)

13.输入该命令按回车键：

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

![img](https://public-1251015552.cos.ap-guangzhou.myqcloud.com/Uploads/image/2023-09-19/11173564a4358.jpeg)

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

![img](https://public-1251015552.cos.ap-guangzhou.myqcloud.com/Uploads/image/2023-09-19/11173755164e9.jpeg)

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Centos7.6如何升级为Centos8