Howto mkosi

installation

install package on archlinux:

pacman -S mkosi mtools systemd-ukify --noconfirm

create temporary directory to store images:

mkdir mkosimages && cd mkosimages

create debian img

install packages:

pacman -S debootstrap debian-archive-keyring apt --noconfirm

create image:

mkosi --distribution debian --release bookworm --format disk --bootable --checksum --root-password password --package linux-image-generic,systemd,systemd-boot,systemd-sysv,udev,dbus --package openssh-client,vim --output debian.img

boot image using systemd:

systemd-nspawn --boot --image debian.img

boot image using qemu/kvm:

mkosi --output debian.img --qemu-smp 2 qemu

create arch img

install packages:

pacman -S  arch-install-scripts --noconfirm

create image:

mkosi --distribution arch --format disk --bootable --checksum --root-password password --package linux,systemd,udev,dbus --package openssh-client,vim --output arch.img

boot image using systemd:

systemd-nspawn --boot --image arch.img

boot image using qemu/kvm:

mkosi --output arch.img --qemu-smp 2 qemu

create ubuntu img

install packages:

pacman -S debootstrap ubuntu-keyring apt --noconfirm

create image:

mkosi --distribution ubuntu --release noble --format disk --bootable --checksum --root-password password --package linux-image-generic,systemd,systemd-boot,systemd-sysv,udev,dbus --package openssh-client,vim --output ubuntu.img

boot image using systemd:

systemd-nspawn --boot --image ubuntu.img

boot image using qemu/kvm:

mkosi --output ubuntu.img --qemu-smp 2 qemu

create almalinux img

install the following package using yay:

yay -S dnf-legacy-utils 

create image:

mkosi --distribution alma --release 9 --format disk --bootable --checksum --root-password password --package bash,coreutils,util-linux,systemd,rpm --output almalinux.img

boot image using systemd:

systemd-nspawn --boot --image almalinux.img

boot image using qemu/kvm:

mkosi --output almalinux.img --qemu-smp 2 qemu

create rhel image

create image:

mkosi \
 --distribution rhel-ubi \
 --release 9 \
 --format disk \
 --bootable \
 --checksum \
 --root-password redhat \
 --package bash,coreutils,util-linux,systemd,rpm \
 --output rhel9.img

references

• https://github.com/systemd/mkosi
• http://0pointer.net/blog/mkosi-a-tool-for-generating-os-images.html