run ubuntu in qemu with kvm

created: 20240107 updated: 20240107 authors: alick

download ubuntu iso

aria2c -c -x 10 -j 10 http://cdimage.ubuntu.com/ubuntu/releases/18.04/release/ubuntu-18.04.3-server-amd64.iso.torrent

create hda disk and load img to setup system

qemu-img create vdisk.img 10G
qemu-system-x86_64 -cpu host -enable-kvm -hda vdisk.img -cdrom ./ubuntu-18.04.3-server-amd64.iso -boot d -m 4096

start installed system and just in console with ssh port

qemu-system-x86_64 -cpu host -enable-kvm -hda vdisk.img -boot c -m 4096  -nographic \
    -nic user,hostfwd=tcp:127.0.0.1:4022-:22

https://qemu-project.gitlab.io/qemu/system/images.html

https://serverfault.com/questions/471719/how-to-start-qemu-directly-in-the-console-not-in-curses-or-sdl

You can update GRUB to pass the required options to the kernel. I'm using Ubuntu 18.04, and I did the following:

Update grub in the guest OS:

sudoedit /etc/default/grub

Change GRUB_CMDLINE_LINUX="" to GRUB_CMDLINE_LINUX="console=tty0 console=ttyS0,9600n8"
run sudo update-grub