Install nmap if you don't already have it on your Linux computer. Run "sudo apt-get install nmap" on Ubuntu, or "sudo dnf ...
Acquire a suitable internet connection. Your home internet is rarely enough for self-hosting. You can easily exceed bandwidth ...
This is why I finally made the switch to OPNsense and built myself a firewall with nothing more than a USB drive for the OS ...
If you have important data trapped on a computer that's not working, there are ways to recover it. You should already have a backup, but here's what you can do in an emergency. Our team tests, rates, ...