Manual Software Installation Instructions:

Begin by acquiring a specific copy of the Raspberry Pi Lite operating system, dated 2021-05-28; this version can be found here:

https://downloads.raspberrypi.org/raspios_lite_armhf/images/raspios_lite_armhf-2021-05-28/

Best practice is to verify the downloaded .zip file containing the Raspberry Pi Lite OS matches the published SHA256 hash of the file; for additional reference that hash is: c5dad159a2775c687e9281b1a0e586f7471690ae28f2f2282c90e7d59f64273c. After verifying the file’s data integrity, you can decompress the .zip file to obtain the operating system image that it conta