After installing NMAP: dnet: Failed to open device eth0?

Question

Error after starting command > nmap

dnet: Failed to open device eth0 after installing NMAP.
QUITTING!

Answer 1

In my case, the error was caused by nmap being installed through Snap.

In order to get nmap to work, I had to tell snap to connect it to the network-control:

sudo snap connect nmap:network-control

After that everything worked fine.