详情可参考官网：

• https://docs.openeuler.openatom.cn/zh/docs/22.03_LTS_SP4/docs/os_upgrade_and_downgrade/openEuler-22.03-LTS升降级指导.html

1、查看当前环境版本

cat /etc/os-release

2、将原repo源替换为openEuler-22.03-LTS-SP4 repo源

$ cd /etc/yum.repos.d/
$ mv openEuler.repo openEuler.repo.bak
$ vim openEuler-22.03-LTS-SP4.repo
[SP4_OS]

name=SP4_OS

baseurl=http://repo.openeuler.org/openEuler-22.03-LTS-SP4/OS/$basearch/

metadata_expire=1h

enabled=1

gpgcheck=1

gpgkey=http://repo.openeuler.org/openEuler-22.03-LTS-SP4/OS/$basearch/RPM-GPG-KEY-openEuler



[SP4_everything]

name=SP4_everything

baseurl=http://repo.openeuler.org/openEuler-22.03-LTS-SP4/everything/$basearch/

metadata_expire=1h

enabled=1

gpgcheck=1

gpgkey=http://repo.openeuler.org/openEuler-22.03-LTS-SP4/everything/$basearch/RPM-GPG-KEY-openEuler



[SP4_EPOL]

name=EPOL

baseurl=http://repo.openeuler.org/openEuler-22.03-LTS-SP4/EPOL/main/$basearch/

metadata_expire=1h

enabled=1

gpgcheck=1

gpgkey=http://repo.openeuler.org/openEuler-22.03-LTS-SP4/OS/$basearch/RPM-GPG-KEY-openEuler



[SP4_debuginfo]

name=debuginfo

baseurl=http://repo.openeuler.org/openEuler-22.03-LTS-SP4/debuginfo/$basearch/

metadata_expire=1h

enabled=1

gpgcheck=1

gpgkey=http://repo.openeuler.org/openEuler-22.03-LTS-SP4/debuginfo/$basearch/RPM-GPG-KEY-openEuler



[SP4_source]

name=source

baseurl=http://repo.openeuler.org/openEuler-22.03-LTS-SP4/source/

metadata_expire=1h

enabled=1

gpgcheck=1

gpgkey=http://repo.openeuler.org/openEuler-22.03-LTS-SP4/source/RPM-GPG-KEY-openEuler



[SP4_update]

name=SP4_update

baseurl=http://repo.openeuler.org/openEuler-22.03-LTS-SP4/update/$basearch/

metadata_expire=1h

enabled=1

gpgcheck=1

gpgkey=http://repo.openeuler.org/openEuler-22.03-LTS-SP4/OS/$basearch/RPM-GPG-KEY-openEuler



[SP4_update-source]

name=SP4_update-source

baseurl=http://repo.openeuler.org/openEuler-22.03-LTS-SP4/update/source/

metadata_expire=1h

enabled=1

gpgcheck=1

gpgkey=http://repo.openeuler.org/openEuler-22.03-LTS-SP4/source/RPM-GPG-KEY-openEuler

3、升级

WARNING

执行中有一个判断选项，输入y后回车即可，中间持续约15分钟，直至屏幕显示“Complete!”即升级成功

dnf update | tee update_log

4、重启系统

reboot

5、升级结果验证

 cat /etc/openEuler-latest

此时显示系统版本为openEuler-22.03-LTS-SP4，即表示已成功升级到SP4版本。