nwgat nwgat

Ubuntu: Install Kernel and Set GRUB Default Kernel

Install Kernel

Install the default kernel:

sudo apt install linux-generic

Set GRUB Default Kernel

Find entrance from /boot/grub/grub.cfg
- Get the $menuentry_id_option:

Installing Arch Linux AArch64 on the NanoPi R2S

There is current no support for the NanoPi R2S in ArchLinuxArm, but it's possible to run it using the generic aarch64 installation.

Prepare sd-card/image

Copy bootloader and uBoot from an armbian image using for the NanoPi R2S using dd (sectors 32 to 32767) everything before the partition, except the partition table).
Create an ext4 partition on /dev/mmcblk0p1 at offset of 32768 sectors (16384 KiB):

Device         Boot Start      End  Sectors  Size Id Type

The CD that came with the device listed RTL8671B, but it's not on Realtek's website. Instead the manual points you to:

https://www.mytechkey.com/pages/driver

4.Bluetooth 5.0 Dongle

Driver Link:

https://www.dropbox.com/s/gwo9lz777i82f70/BT5.0%20Driver.zip?dl=0

How to disable cloud-init in Ubuntu

Prevent start

Create an empty file to prevent the service from starting
```
  sudo touch /etc/cloud/cloud-init.disabled
```

Uninstall

Using VAAPI's hardware accelerated video encoding on Linux with Intel's hardware on FFmpeg and libav

Hello, brethren :-)

As it turns out, the current version of FFmpeg (version 3.1 released earlier today) and libav (master branch) supports full H.264 and HEVC encode in VAAPI on supported hardware that works reliably well to be termed "production-ready".

	from enum import Enum
	import time

	TEMP_PATH = "/sys/devices/virtual/thermal/thermal_zone0/temp"
	FAN_PATH = "/sys/class/thermal/cooling_device0/cur_state"


	class FanSpeed(Enum):
	OFF = 0
	LOW = 1

	import os
	from PIL import Image
	from PIL.ImageOps import grayscale
	from watchdog.events import RegexMatchingEventHandler

	class ImagesEventHandler(RegexMatchingEventHandler):
	THUMBNAIL_SIZE = (128, 128)
	IMAGES_REGEX = [r".*[^_thumbnail]\.jpg$"]

	def __init__(self):

	# Scanner i2c en MicroPython \| MicroPython i2c scanner
	# Renvoi l'adresse en decimal et hexa de chaque device connecte sur le bus i2c
	# Return decimal and hexa adress of each i2c device
	# https://projetsdiy.fr - https://diyprojects.io (dec. 2017)

	import machine
	i2c = machine.I2C(scl=machine.Pin(5), sda=machine.Pin(4))

	print('Scan i2c bus...')
	devices = i2c.scan()

	# Import requests (to download the page)
	import requests

	# Import BeautifulSoup (to parse what we download)
	from bs4 import BeautifulSoup

	# Import Time (to add a delay between the times the scape runs)
	import time

	# Import smtplib (to allow us to email)

	### microPython ESP8266 documentation from http://docs.micropython.org/en/latest/esp8266/esp8266/quickref.html#neopixel-driver
	###
	###from machine import Pin
	###from neopixel import NeoPixel
	###
	###pin = Pin(0, Pin.OUT) # set GPIO0 to output to drive NeoPixels
	###np = NeoPixel(pin, 8) # create NeoPixel driver on GPIO0 for 8 pixels
	###np[0] = (255, 255, 255) # set the first pixel to white
	###np.write() # write data to all pixels
	###r, g, b = np[0] # get first pixel colour