# mkosi > Tool for building modern, legacy-free Linux images. > Part of `systemd`. > More information: . - Show current build configuration to verify what would be built: `mkosi summary` - Build an image with default settings (if no distribution is selected, the distribution of the host system is used): `mkosi build --distribution {{fedora|debian|ubuntu|arch|opensuse|...}}` - Build an image and run an interactive shell in a systemd-nspawn container of the image: `mkosi shell` - Boot an image in a virtual machine using QEMU (only supported for disk images or CPIO images when a kernel is provided): `mkosi qemu` - Display help: `mkosi help`