服务器怎样分出一个vps

# 安装KVM和相关工具
sudo apt-get update
sudo apt-get install qemu-kvm libvirt-daemon-system libvirt-clients bridge-utils

# 创建一个新的虚拟机镜像
sudo qemu-img create -f qcow2 ubuntu-qcow2.img 20G

# 下载Ubuntu镜像
wget https://releases.ubuntu.com/20.04/ubuntu-20.04.5-live-server-amd64.iso

# 创建虚拟机配置文件
sudo nano /etc/libvirt/qemu/ubuntu.xml

# 配置文件内容示例
<domain type='kvm'>
  <name>ubuntu-vm</name>
  <memory unit='KiB'>2097152</memory>
  <currentMemory unit='KiB'>2097152</currentMemory>
  <vcpu placement='static'>2</vcpu>
  <os>
    <type arch='x86_64' machine='pc-i440fx-2.9'>hvm</type>
    <boot dev='cdrom'/>
  </os>
  <devices>
    <disk type='file' device='disk'>
      <driver name='qemu' type='qcow2'/>
      <source file='/var/lib/libvirt/images/ubuntu-qcow2.img'/>
      <target dev='vda' bus='virtio'/>
    </disk>
    <interface type='network'>
      <mac address='52:54:00:73:3a:3f'/>
      <source network='default'/>
      <model type='virtio'/>
    </interface>
    <graphics type='vnc' port='-1' autoport='yes' listen='0.0.0.0' keymap='en-us'/>
  </devices>
</domain>

# 定义并启动虚拟机
sudo virsh define ubuntu.xml
sudo virsh start ubuntu-vm