troubleshoot network problems in ubuntu 20.04 code example

Example: wireless connection troubleshooting ubuntu 20.04

rfkill list
#if hard blocked option is yes
lspci -v
#at the Network controller you will find your wifi adapter name

#search on google and download the iwllwifi corresponding at the network controller

#exemple for intel i go to https://www.intel.com/content/www/us/en/support/articles/000005511/wireless.html

#And download iwlwifi-xxxx.tgz

#After unzip and go to the directory with the terminal and copie iwlwifi file in /lib/firmware
cp iwlwifi-xxx /lib/firmware

#After reboot
reboot