The netinst CD image is a popular image which can be used to install bullseye with the debian-installer. This installation method is intended to boot from the image and install additional packages over a network; hence the name “netinst”. The image has the software components needed to run the installer and the base packages to provide a minimal bullseye system. If you'd rather, you can get a full size CD/DVD image which will not need the network to install. You only need the first image of such set.

Download whichever type you prefer and burn it to an optical disc.

네트워크로 debian-installer를 부팅하는 것도 가능합니다. 아키텍처와 netboot 설정에 따라 다양한 방법의 네트워크 부팅 방법이 있습니다. netboot/에 들어 있는 파일을 이용해 debian-installer를 네트워크 부팅합니다.

It's possible to boot the installer using no removable media, but just an existing hard disk, which can have a different OS on it. Download hd-media/initrd.gz, hd-media/vmlinuz, and a 데비안 CD/DVD image to the top-level directory of the hard disk. Make sure that the image has a filename ending in .iso. Now it's just a matter of booting linux with the initrd.