virsh dominfo 信息查看kvm虚机的内存、cpu信息
命令查看内存，cpu信息：#virsh dominfo CentOS7.9_x86_64
Id: 1
Name: CentOS7.9_x86_64
UUID: 5f06b57b-24fc-42e4-898e-2b6a107c475e
OS Type: hvm
State: running
CPU(s): 2
CPU time: 91.0s
Max memory: 4194304 KiB
Used memory: 4194304 KiB
Persistent: yes
Autostart: disable
Managed save: no
Security model: none
Security DOI: 0
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