wiki.matoken.org

$ wget https://downloads.raspberrypi.org/raspios_lite_armhf/images/raspios_lite_armhf-2022-04-07/2022-04-04-raspios-bullseye-armhf-lite.img.xz https://downloads.raspberrypi.org/raspios_lite_armhf/images/raspios_lite_armhf-2022-04-07/2022-04-04-raspios-bullseye-armhf-lite.img.xz.sha256 https://downloads.raspberrypi.org/raspios_lite_armhf/images/raspios_lite_armhf-2022-04-07/2022-04-04-raspios-bullseye-armhf-lite.img.xz.sig

$ sha256sum -c ./2022-04-04-raspios-bullseye-armhf-lite.img.xz.sha256
2022-04-04-raspios-bullseye-armhf-lite.img.xz: OK
$ gpg --verify ./2022-04-04-raspios-bullseye-armhf-lite.img.xz.sig
gpg: assuming signed data in './2022-04-04-raspios-bullseye-armhf-lite.img.xz'
gpg: Signature made Thu 07 Apr 2022 03:40:32 PM JST
gpg:                using RSA key 54C3DD610D9D1B4AF82A37758738CD6B956F460C
gpg: Good signature from "Raspberry Pi Downloads Signing Key" [expired]
gpg: Note: This key has expired!
Primary key fingerprint: 54C3 DD61 0D9D 1B4A F82A  3775 8738 CD6B 956F 460C

$ wget https://www.raspberrypi.org/raspberrypi.gpg.key
$ gpg --import ./raspberrypi.gpg.key 
gpg: key 82B129927FA3303E: public key "Raspberry Pi Archive Signing Key" imported
gpg: Total number processed: 1
gpg:               imported: 1
$ rm ./raspberrypi.gpg.key
$ gpg --verify ./2022-04-04-raspios-bullseye-armhf-lite.img.xz.sig
gpg: assuming signed data in './2022-04-04-raspios-bullseye-armhf-lite.img.xz'
gpg: Signature made Thu 07 Apr 2022 03:40:32 PM JST
gpg:                using RSA key 54C3DD610D9D1B4AF82A37758738CD6B956F460C
gpg: Good signature from "Raspberry Pi Downloads Signing Key" [expired]
gpg: Note: This key has expired!
Primary key fingerprint: 54C3 DD61 0D9D 1B4A F82A  3775 8738 CD6B 956F 460C

$ gpg --keyserver hkps://keyserver.ubuntu.com --recv-key 54C3DD610D9D1B4AF82A37758738CD6B956F460C
$ gpg --verify ./2022-04-04-raspios-bullseye-armhf-lite.img.xz.sig
gpg: assuming signed data in './2022-04-04-raspios-bullseye-armhf-lite.img.xz'
gpg: Signature made Thu 07 Apr 2022 03:40:32 PM JST
gpg:                using RSA key 54C3DD610D9D1B4AF82A37758738CD6B956F460C
gpg: Good signature from "Raspberry Pi Downloads Signing Key" [unknown]
gpg: WARNING: This key is not certified with a trusted signature!
gpg:          There is no indication that the signature belongs to the owner.
Primary key fingerprint: 54C3 DD61 0D9D 1B4A F82A  3775 8738 CD6B 956F 460C

Raspberry Piをmass storage deviceで起動．

$ sudo ./rpiboot 
RPIBOOT: build-date May  8 2022 version 20220504~214218 5e0ae34d
Waiting for BCM2835/6/7/2711...
Loading embedded: bootcode.bin
Sending bootcode.bin
Successful read 4 bytes 
Waiting for BCM2835/6/7/2711...
Loading embedded: bootcode.bin
Second stage boot server
Loading embedded: start.elf
File read: start.elf
Second stage boot server done

書き込み

$ xzcat ./2022-04-04-raspios-bullseye-armhf-lite.img.xz | pv | sudo dd of=/dev/sdb bs=1M conv=sync