Offline Raspberry Pi Multi-Coin Miner

I need a fully-configured Raspberry Pi 4 SD-card image that boots straight into fast, command-line crypto-mining software and never tries to reach the internet or a local network. The goal is small-scale, self-contained experimentation: once the Pi powers up, it should immediately start hashing and be able to switch between (or individually target) up to forty different cryptocurrencies.

You can choose whichever lightweight Linux base you feel suits the task best; I only care that the image is stable and that performance on the Pi 4 is squeezed for every hash per second you can extract. Overclock settings, optimal kernel flags, and any assembly-level tweaks are welcome so long as the system remains reliable on stock cooling.

Because the unit will operate in an offline environment, any pool or network calls must be completely disabled. All mined blocks, share logic, or logging should stay local to the filesystem so I can inspect results later. Please include a simple text config that lets me toggle algorithms or point the miner at a different currency without rebuilding the image.

Deliverables
• Ready-to-flash .img file for Raspberry Pi 4
• Brief README covering: boot process, algorithm selection, overclock options, safe shutdown, and how to pull log/output files
• A short benchmark log showing hash rates for at least five representative coins on the Pi 4

I’ll test by flashing, powering the board with no Ethernet or Wi-Fi and confirming it starts mining within 30 seconds while remaining network-silent.