- Download the font on this link, for example:
https://github.com/ryanoasis/nerd-fonts/releases/download/v3.2.1/JetBrainsMono.zip
- Create font directory in the user home dir, in case it does not exist:
mkdir ~/.fonts
- Then unzip
unzip -d ~/.fonts/ ~/Downloads/JetBrainsMono.zip
- After that, just erase all existing font caches
fc-cache -rv
- And then you are good to go