03.cento8升级centos-stream

centos8已经无法安装软件升级过程如下：

• cd /etc/yum.repos.d
• vi CentOS-Linux-BaseOS.repo
• vi CentOS-Linux-AppStream.repo
• [baseos]
• name=CentOS Linux $releasever - BaseOS
• #mirrorlist=http://mirrorlist.centos.org/?release=$releasever&arch=$basearch&repo=BaseOS&infra=$infra
• #baseurl=http://mirror.centos.org/$contentdir/$releasever/BaseOS/$basearch/os/
• baseurl=https://vault.centos.org/centos/$releasever/BaseOS/$basearch/os/
• gpgcheck=1
• enabled=1
• gpgkey=file:///etc/pki/rpm-gpg/RPM-GPG-KEY-centosofficial
• [appstream]
• name=CentOS Linux $releasever - AppStream
• #mirrorlist=http://mirrorlist.centos.org/?release=$releasever&arch=$basearch&repo=AppStream&infra=$infra
• #baseurl=http://mirror.centos.org/$contentdir/$releasever/AppStream/$basearch/os/
• baseurl=https://vault.centos.org/centos/$releasever/AppStream/$basearch/os/
• gpgcheck=1
• enabled=1
• gpgkey=file:///etc/pki/rpm-gpg/RPM-GPG-KEY-centosofficial
• dnf update
• dnf --disablerepo '*' --enablerepo extras swap centos-linux-repos centos-stream-repos
• dnf distro-sync
• #注意事项目：
• #以上会反复出现RPM: error: db5 error(-30969)
• #可以任意安装软件进行测试
• cd /var/lib/rpm
• rm __db*
• rpm --rebuilddb
• dnf update
• #rootfs系统需要强制删除filesystem
• #先查询
• rpm -qa|grep filesystem
• #在删除
• rpm -e --nodeps filesystem-具体版本号