Building a Linux Distro From Scratch: WiFi Drivers & Firmware

Опубликовано: 29 Август 2023
на канале: Monkey see, monkey do

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CONTENTS
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00:00 Intro
00:11 Target audience
00:48 Running ISO image from the previous tutorial
01:30 Listing network devices
02:08 Why there's no wlan0 interface?
02:45 Two essential things affecting the presence of the wireless interface
03:46 Figuring out the model of the WiFi adapter
05:48 Wifi drivers/modules might be external or embedded into the Linux Kernel
06:40 Listing Kernel modules (device drivers)
07:05 Searching for WiFi drivers
07:55 Additional WiFi drivers
08:45 Inspecting WiFi driver's info
10:25 Updating Linux Kernel configuration to support specific WiFi adapters
11:35 Realtek WiFi drivers added to the Linux Kernel
12:14 How do you know which drivers do you need for your specific hardware?
14:55 Inspecting default WiFi drivers for a given hardware
15:25 Enabling Linux Kernel Modules under the configuration file
17:05 Exploring available device drivers
18:00 Searching for specific WiFi drivers
19:00 A quick recap on steps to be taken to configure WiFi drivers
20:11 Eventual Linux Kernel configuration including WiFi drivers
21:20 Time to recompile the Kernel!
23:00 Updating Linux Kernel under the ISO image with a newly compiled one
24:20 Updating ISO image
24:55 Dealing with Firmware
25:15 How to figure out the actual Firmware requested by the Linux Kernel
26:24 Downloading specific Firmware sources
27:25 Reading Firmware README
28:00 Compiling WiFi Firmware
28:28 Creating Firmware directory under the RootFS
29:30 Installing WiFi Firmware to RootFS
31:00 Downloading & installing 'iw' command to RootFS
33:00 Downloading & installing 'wpa_supplicant' command to RootFS
35:00 Rebuilding ISO image one last time
35:30 Testing new ISO in QEMU
36:30 Burning ISO to USB flash drive
37:24 Why ISO image is so HUGE?
38:23 TESTING WIFI ON THE REAL HARDWARE
39:10 Detecting network devices
39:45 How to figure out the required firmware?
41:15 Inspecting Firmware one more time
41:47 Finding 'wlan0' interface and why it's already UP
42:10 A quick recap on '/init' script
43:20 Working with 'iw' command
43:35 Listing available WiFi networks
45:00 Creating 'wifi.conf' file
45:30 Inspecting 'wifi.conf' file
46:00 CONNECTING TO WIFI
46:35 Checking the connection to WiFi network
47:25 A quick recap on '/etc/network.sh' callback script
47:57 Obtaining IP address via 'udhcpc'
48:40 Pinging remote server
48:50 Making HTTP request with 'get'
49:30 Installing VIM
52:24 Testing VIM
53:02 Outro