sudo grep -e 'vmx' /proc/cpuinfo
sudo dnf install -y epel-release
sudo dnf install -y bridge-utils virt-top libguestfs-tools bridge-utils virt-viewer qemu-kvm libvirt virt-manager virt-install
sudo usermod -aG libvirt $USER
newgrp libvirt
sudo systemctl enable --now libvirtd
  • Set up a bridge interface.
  • Check the current interfaces. 
    sudo nmcli connection show
  • Delete any existing virbr0 interface. 
    sudo nmcli connection delete <INTERFACE_UUID_HERE>
  • Delete the main Ethernet interface as well (you will lose your ssh connecton if you do this via ssh). 
    sudo nmcli connection delete <INTERFACE_UUID_HERE>
  • Create the new bridge connection. 
    sudo nmcli connection add type bridge autoconnect yes con-name virbr0 ifname virbr0
sudo nmcli connection modify virbr0 ipv4.addresses 192.168.1.106/24 ipv4.method manual
sudo nmcli connection modify virbr0 ipv4.gateway 192.168.1.1
sudo nmcli connection modify virbr0 ipv4.dns 192.168.1.1
  • Add the bridge slave. Make sure the Ethernet device selected is the main one that connects out to the Internet. 
    sudo nmcli connection add type bridge-slave autoconnect yes con-name enp1s0f1 ifname enp1s0f1 master virbr0
  • Bring up the bridge connection. 
    sudo nmcli connection up virbr0
  • Run the following script in tmux as a root or user with sudo privileges to do the above automatically: 
    #!/bin/bash
sudo nmcli connection delete eno1
sudo nmcli connection delete virbr0
sudo nmcli connection add type bridge autoconnect yes con-name virbr0 ifname virbr0
sudo nmcli connection modify virbr0 ipv4.addresses 192.168.1.105/24 ipv4.method manual
sudo nmcli connection modify virbr0 ipv4.gateway 192.168.1.1
sudo nmcli connection modify virbr0 ipv4.dns 192.168.1.1
sudo nmcli connection add type bridge-slave autoconnect yes con-name eno1 ifname eno1 master virbr0
sudo nmcli connection up virbr0
  • Edit /etc/qemu-kvm/bridge.conf
  • Add this line. 
    allow all
  • Set the ownership of the images directory to your user. 
    sudo chown -R $USER:libvirt /var/lib/libvirt/
  • Restart libvirtd. 
    sudo systemctl restart libvirtd
  • Example virt-install that uses the new bridge. ``` virt-install –name ubuntu22.04 –ram=4096 –vcpus=3 –cpu host –hvm –disk path=~/vms/ubuntu22-04.qcow2,size=15 –cdrom ~/isos/ubuntu-22.04.5-live-server-amd64.iso –graphics none –console pty,target_type=serial –os-variant ubuntu22.04 –network bridge=virbr0,model=virtio –hvm –force –debug –boot kernel=mnt/casper/vmlinuz,initrd=mnt/casper/initrd,kernel_args=”console=ttyS0”

```

Updated: