问题描述
尝试在yum及更高版本上安装Ubuntu 20.04是错误消息。
sudo apt-get install yum
Reading package lists... Done
Building dependency tree
Reading state @R_415_4045@ion... Done
Package yum is not available,but is referred to by another package.
This may mean that the package is missing,has been obsoleted,or
is only available from another source
E: Package 'yum' has no installation candidate
解决方法
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