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This article mainly introduces how to upgrade Centos7 to Centos8, the article is very detailed, has a certain reference value, interested friends must read it!

If you upgrade in a formal environment, please make a good data backup and important configuration backup! Because the upgrade will cause some applications to be uninstalled.

1. Install the epel source

Yum-y install epel-release

two。 Install rpmconf and yum-utils

Yum- y install rpmconf yum-utils

3. Execute rpmconf, if prompted, please enter Y and enter to continue, if not prompted to proceed to step 4

Rpmconf-a

4. Install dnf

Yum-y install dnf

5. Remove yum and yum-metadata-parser

Dnf-y remove yum yum-metadata-parser

6. Delete the / etc/yum directory

Rm-rf / etc/yum

7. Install Centos8 source and upgrade epel source

Dnf-y upgradednf-y upgrade http://mirrors.163.com/centos/8.0.1905/BaseOS/x86_64/os/Packages/centos-release-8.0-0.1905.0.9.el8.x86_64.rpmdnf-y upgrade https://dl.fedoraproject.org/pub/epel/epel-release-latest-8.noarch.rpmdnf clean all

8. Uninstall the kernel of centos7

Rpm-e-- nodeps `rpm-Q kernel`

9. When upgrading to centos8, an error will usually be reported in this step. If there is no error, please proceed to step 10.

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

After finding an error, uninstall the package name similar to the one after from package on the diagram.

Rpm-e-- nodeps sysvinit-tools-2.88-14.dsf.el7.x86_64rpm-e-- nodeps python-inotify-0.9.4-4.el7.noarchrpm-e-- nodeps adwaita-qt5-1.0-1.el7.x86_64rpm-e-- nodeps pycairo-1.8.10-8.el7.x86_64

Perform the upgrade again after uninstalling

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

10. When you execute rpmconf, the following interface appears. Just type Y and enter all the time.

Rpmconf-a

11. Restart the machine

Reboot

The above is all the contents of the article "how to upgrade Centos7 to Centos8". Thank you for reading! Hope to share the content to help you, more related knowledge, welcome to follow the industry information channel!

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