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nerves_system_x86_64

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Nerves System - x86_64

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README.md 

# Generic x86_64 System



[![CircleCI](https://circleci.com/gh/nerves-project/nerves_system_x86_64/tree/master.svg?style=svg)](https://circleci.com/gh/nerves-project/nerves_system_x86_64/tree/master)

[![Hex version](https://img.shields.io/hexpm/v/nerves_system_x86_64.svg "Hex version")](https://hex.pm/packages/nerves_system_x86_64)



This is the base Nerves System configuration for a generic x86_64 system.



| Feature              | Description                     |

| -------------------- | ------------------------------- |

| CPU                  | Intel                           |

| Memory               | 512 MB+ DRAM                    |

| Storage              | Hard disk/SSD/etc. (/dev/sda)   |

| Linux kernel         | 4.13                            |

| IEx terminal         | Display - tty0                  |

| Hardware I/O         | None                            |

| Ethernet             | Yes                             |



Please contact us about this if you're really interested in it. We don't

exercise it regularly except as a base for other x86_64 projects.



## Using



The most common way of using this Nerves System is create a project with `mix

nerves.new` and to export `MIX_TARGET=x86_64`. See the [Getting started

guide](https://hexdocs.pm/nerves/getting-started.html#creating-a-new-nerves-app)

for more information.



If you need custom modifications to this system for your device, clone this

repository and update as described in [Making custom

systems](https://hexdocs.pm/nerves/systems.html#customizing-your-own-nerves-system)



If you're new to Nerves, check out the

[nerves_init_gadget](https://github.com/nerves-project/nerves_init_gadget)

project for creating a starter project. It will get you started with the basics

like bringing up networking, initializing the writable application data

partition, and enabling ssh-based firmware updates.  It's easiest to begin by

using the wired Ethernet interface 'eth0' and DHCP.



## Root disk naming



If you have multiple SSDs, or other devices connected, it's

possible that Linux will enumerate those devices in a nondeterministic order.

This can be mitigated by using `udev` to populate the `/dev/disks/by-*`

directories, but even this can be inconvenient when you just want to refer to

the drive that provides the root filesystem. To address this, `erlinit` creates

`/dev/rootdisk0`, `/dev/rootdisk0p1`, etc. and symlinks them to the expected

devices. For example, if your root file system is on `/dev/mmcblk0p1`, you'll

get a symlink from `/dev/rootdisk0p1` to `/dev/mmcblk0p1` and the whole disk

will be `/dev/rootdisk0`. Similarly, if the root filesystem is on `/dev/sdb1`,

you'd still get `/dev/rootdisk0p1` and `/dev/rootdisk0` and they'd by symlinked

to `/dev/sdb1` and `/dev/sdb` respectively.