If you are starting a new project, consider instead — it has newer software and longer active support. But if you specifically need Bullseye (e.g., legacy software compatibility), the above covers everything.
wget https://ftp-master.debian.org/keys/archive-key-11.asc gpg --import archive-key-11.asc Then verify: iso debian 11
sha256sum -c SHA256SUMS --ignore-missing Import the Debian signing key: If you are starting a new project, consider
Here is informative content about — what they are, which one to choose, how to verify them, and where to get them. 1. What is a Debian 11 ISO? A Debian ISO is a disk image containing the files needed to install or run Debian 11 (Bullseye) without an existing OS. You write it to a USB drive or DVD. legacy software compatibility)