I can't use ufw on Ubuntu 20.04: "command not found"
Somehow, I can't use sudo ufw. The terminal keeps saying:
command not found
Is it even installed on your system?
You can install UFW with
sudo apt install ufw
You can get help with UFw with
ufw --help
You can download UFW directly from the ubuntu software center:
But, above all else, you can set paramenters for UFW using the GUI by installing Firewall Configuration tool from the ubuntu software center.
reference