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virt-install

Create virtual machines with libvirt and begin OS installation.

More information.

Create a virtual machine with 1 GB RAM and 12 GB storage and start a Debian installation:

virt-install --name {vm_name} --memory {1024} --disk path={path/to/image.qcow2},size={12} --cdrom {path/to/debian.iso}

Create a x86-64, KVM-accelerated, UEFI-based virtual machine with the Q35 chipset, 4 GiB RAM, 16 GiB RAW storage, and start a Fedora installation:

virt-install --name {vm_name} --arch {x86_64} --virt-type {kvm} --machine {q35} --boot {uefi} --memory {4096} --disk path={path/to/image.raw},size={16} --cdrom {path/to/fedora.iso}

Create a diskless live virtual machine without an emulated sound device or a USB controller. Don't start an installation and don't autoconnect to console but attach a cdrom to it (might be useful for when using a live CD like tails):

virt-install --name {vm_name} --memory {512} --disk {none} --controller {type=usb,model=none} --sound {none} --autoconsole {none} --install {no_install=yes}  --cdrom {path/to/tails.iso}

Create a virtual machine with with 16 GiB RAM, 250 GiB storage, 8 cores with hyperthreading, a specific CPU topology, and a CPU model that shares most features with the host CPU:

virt-install --name {vm_name} --cpu {host-model},topology.sockets={1},topology.cores={4},topology.threads={2} --memory {16384} --disk path={path/to/image.qcow2},size={250} --cdrom {path/to/debian.iso}

Create a virtual machine and kickstart an automated deployment based on Fedora 35 using only remote resources (no ISO required):

virt-install --name {vm_name} --memory {2048} --disk path={path/to/image.qcow2},size={20} --location={https://download.fedoraproject.org/pub/fedora/linux/releases/35/Everything/x86_64/os/} --extra-args={"inst.ks=https://path/to/valid/kickstart.org"}

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