Using qemu without a gui 🔼

Enable Virtualization in your PC UEFI/BIOS. 🔼

In order to use -enable-kvm option (see below at qemu invokation) we may need to enable hardware virtualization. _(help needed to clarify the validity of that assertion)_

Hardware virtualization feature is disabled by default on AMD and Intel CPU's. So you will have to enable them manually if you do wish to use it. Otherwise QEMU will be very slow.

If you have Intel CPU, then all you have to do is, enable VT-x or VT-d from the BIOS of your motherboard.

For AMD CPU, you have to enable AMD-v from the BIOS of your motherboard.

If your CPU supports hardware virtualization, and you enabled it from the BIOS of your computer, then you can check whether Virtualization is enabled :

$ lscpu | grep Virt or $ egrep --color=auto 'vmx|svm|0xc0f' /proc/cpuinfo

Installation in Daedalus 🔼

related packages 🔼

I list qemu packages that emulate some known cpu architectures:

    qemu-system-x86
        /usr/bin/kvm
        /usr/bin/qemu-system-amd64
        /usr/bin/qemu-system-i386
        /usr/bin/qemu-system-x86_64
    qemu-system-arm
        /usr/bin/qemu-system-arm
    qemu-system-misc
        /usr/bin/qemu-system-riscv32
        /usr/bin/qemu-system-riscv64

For each of these binaries we can get a more detailed list of supported cpus and various boards,systems build around that cpu:

$ qemu-system-x86_64 -machine help pc Standard PC (i440FX + PIIX, 1996) (alias of pc-i440fx-7.2) pc-i440fx-7.2 Standard PC (i440FX + PIIX, 1996) (default) q35 Standard PC (Q35 + ICH9, 2009) (alias of pc-q35-7.2) pc-q35-7.2 Standard PC (Q35 + ICH9, 2009)

$ qemu-system-x86_64 -cpu help x86 486 (alias configured by machine type) x86 486-v1 x86 pentium (alias configured by machine type) x86 pentium-v1 x86 coreduo (alias configured by machine type) x86 coreduo-v1 Genuine Intel(R) CPU T2600 @ 2.16GHz x86 phenom (alias configured by machine type) x86 phenom-v1 AMD Phenom(tm) 9550 Quad-Core Processor

$ qemu-system-riscv64 -machine help Supported machines are: microchip-icicle-kit Microchip PolarFire SoC Icicle Kit none empty machine shaktic RISC-V Board compatible with Shakti SDK sifivee RISC-V Board compatible with SiFive E SDK sifive_u RISC-V Board compatible with SiFive U SDK

$ qemu-system-riscv64 -cpu help any rv64 shakti-c sifive-e51 sifive-u54 x-rv128

$ qemu-system-arm -machine help cubieboard cubietech cubieboard (Cortex-A8) microbit BBC micro:bit (Cortex-M0) raspi2b Raspberry Pi 2B (revision 1.1)

$ qemu-system-arm -cpu help

  arm946
  cortex-a15
  cortex-a7

creating our first virtual devuan machine with two commands ! 🔼

Prerequisites:

    qemu-system-x86 installed
    net iso installation medium of devuan stable downloaded.

$ cd myvirtualmachines

1.  creating our virtual disk

$ qemu-img create -f qcow2 devuanstable.qcow2 16G

1.  creating our vm

$ qemu-system-x8664 -enable-kvm -m 2048 -nic user,model=virtio -drive file=devuanstable.qcow2,media=disk,if=virtio -cdrom devuandaedalus5.0.1amd64_netinstall.iso

1.  starging our vm

$ qemu-system-x86_64 -enable-kvm -m 2048 -nic user,model=virtio -drive file=devuanstable.qcow2,media=disk,if=virtio

When invoking qemu to start our vm we must at least provide :

    -enable-kvm / or the emulation would be vary slow
    -m 2048 / the default (128MiB) may crash the program.

Due to default values we can run our emulated x86_64 system with: