CentOS Linux 8 已于 2021 年 12 月 31 日结束生命周期 (EOL)。这意味着 CentOS 8 将不再从 CentOS 官方项目获得开发资源。在 2021 年 12 月 31 日之后，如果您需要更新您的 CentOS，您需要将镜像更改为vault.centos.org，它们将被永久存档。或者，您可能想要升级到 CentOS Stream。

迁移到 CentOS Stream 8 或替代发行版

现在 CentOS 已经转移到 Stream——一个滚动发布的 Linux 发行版，介于Fedora的上游开发和RHEL 的下游开发 之间——许多用户正在转向CentOS 的替代品。其他人决定通过迁移到 CentOS Stream 8 来坚持使用 CentOS。这两种选择都将解决无法更新 CentOS 8 的问题。

要从 CentOS 8 迁移到 CentOS Stream 8，请运行以下命令：

dnf --disablerepo '*' --enablerepo=extras swap centos-linux-repos centos-stream-repos
dnf distro-sync

今天偶然发现，win10上装的wsl，每当连ssh上去，会有一个报错

=> There were exceptions while processing one or more plugins. See
/var/log/landscape/sysinfo.log for more information.

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大概长这样

Welcome to Ubuntu 18.04.4 LTS (GNU/Linux 4.4.0-18362-Microsoft x86_64)

* Documentation: https://help.ubuntu.com
* Management: https://landscape.canonical.com
* Support: https://ubuntu.com/advantage

System information as of Thu Apr 16 20:43:37 CST 2020

System load: 0.52 Memory usage: 59% Processes: 20
Usage of /home: unknown Swap usage: 1% Users logged in: 0

=> There were exceptions while processing one or more plugins. See
/var/log/landscape/sysinfo.log for more information.

0 packages can be updated.
0 updates are security updates.

Last login: Thu Apr 16 20:35:07 2020 from 127.0.0.1

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进去查看日志发现

2020-04-16 20:43:37,827 ERROR Network plugin raised an exception.
Traceback (most recent call last):
File “/usr/lib/python3/dist-packages/landscape/sysinfo/sysinfo.py”, line 99, in run
result = plugin.run()
File “/usr/lib/python3/dist-packages/landscape/sysinfo/network.py”, line 32, in run
for info in self._get_device_info():
File “/usr/lib/python3/dist-packages/landscape/lib/network.py”, line 181, in get_active_device_info
speed, duplex = get_network_interface_speed(sock, interface)
File “/usr/lib/python3/dist-packages/landscape/lib/network.py”, line 261, in get_network_interface_speed
raise e
File “/usr/lib/python3/dist-packages/landscape/lib/network.py”, line 253, in get_network_interface_speed
fcntl.ioctl(sock, SIOCETHTOOL, packed) # Status ioctl() call
OSError: [Errno 22] Invalid argument

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解决方法，修改（创建）配置文件（/etc/landscape/client.conf），禁用 landscape-sysinfo 的 Network plugin：

[sysinfo]
exclude_sysinfo_plugins = Temperature, Network