# `Nerves.Runtime.KVBackend.UBootEnv`
[🔗](https://github.com/nerves-project/nerves_runtime/blob/v0.13.12/lib/nerves_runtime/kv_backend/uboot_env.ex#L4)

U-Boot environment block KV store

This is the default KV store. It delegates to the `UBootEnv` library
for loading and saving to a U-Boot formatted environment block. There's
nothing to configure. It will find the block by reading `/etc/fw_env.config`.

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*Consult [api-reference.md](api-reference.md) for complete listing*