升级到fedora 31

• 将现有的fedora 30更新

dnf upgrade --refresh
           

• 安装系统升级插件

dnf install dnf-plugin-system-upgrade
           

• 升级到fedora 31

• 等待下载完成后, 可能会报一个错, 官方没有提及.

警告：/var/lib/dnf/system-upgrade/fedora-39217cb7243e0d8e/packages/dnf-4.2.9-5.fc31.noarch.rpm: 头V3 RSA/SHA256 Signature, 密钥 ID 3c3359c4: NOKEY
Fedora 31 - x86_64 - aliyun                                                                                                                                                                                                                                       0.0  B/s |   0  B     00:00    
Curl error (37): Couldn't read a file:// file for file:///etc/pki/rpm-gpg/RPM-GPG-KEY-fedora-x86_64 [Couldn't open file /etc/pki/rpm-gpg/RPM-GPG-KEY-fedora-x86_64]
下载的软件包保存在缓存中，直到下次成功执行事务。
您可以通过执行 'dnf clean packages' 删除软件包缓存。
[[email protected] ~]# rpmkeys --import /etc/pki/rpm-gpg/RPM-GPG-KEY-fedora-x86_64
错误：/etc/pki/rpm-gpg/RPM-GPG-KEY-fedora-x86_64：导入读取时失败(2)。
           

• 运行下面的指令后, 再

  dnf system-upgrade download --releasever=31

  即可.

rpmkeys --import /etc/pki/rpm-gpg/RPM-GPG-KEY-fedora-31-x86_64
           

• 重启系统.

dnf system-upgrade reboot