If you don’t have paid subscription you should switch to No-Subscription Repository. This is the recommended repository for testing and non-production use. Its packages are not as heavily tested and validated. You don’t need a subscription key to access the pve-no-subscription repository.

PVE虚拟出来的vm系统的cpu,默认不支持vmx，即不支持嵌套虚拟化，在虚拟机中使用命令来验证： # egrep –color ‘vmx|svm’ /proc/cpuinfo 没有输出即不支持，否则会高亮显示vmx或者svm。 有时为了测试和学习，需要开启pve的嵌套虚拟化，以便能在其系统中安装类似esxi，hyper-v之类的虚拟化软件，就需要开