ubuntu安装cockpit 报错
Cannot refresh cache whilst offline
解决
可能是网络渲染器（render）有问题，需要修改/etc/netplan/00-installer-config.yaml文件，
在network组最后添加
renderer: NetworkManager
如
# This is the network config written by 'subiquity'
network:
ethernets:
enp3s0:
dhcp4: true
version: 2
renderer: NetworkManager然后ssh运行
sudo netplan apply
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