Скачать или смотреть [Solved] Speed up slow WiFi on Ubuntu 20.04

Sometimes Ubuntu 20.04 [Focal Fossa] and the late distributions are having a slow WiFi connection speed issue, that could be related to multi factors like the old WiFi adapter being used and the not fully supported versions of those adapters, and some factors related to the WiFi module settings and the WiFi channel connection rate (2.4GHz or 5.5GHz).
Here I'm just sharing my fix and how I handled this issue, there is another solutions to be considered and you can find some on this Ubuntu thread depending on your machine and your adapter:
https://askubuntu.com/questions/12305...

Commands used in the video:

1- sudo lshw -class newtwork -short && nmcli device status
2- sudo iwlist [your_wifi_device_name] scanning
3- sudo nano /etc/NetworkManager/conf.d/default-wifi-powersave-on.conf