How to use a linux machine as a hotspot

Create network:

sudo nmcli device wifi hotspot con-name hotspotname ssid hotspotname band bg password verysecretpassword

Doesn't work with PMF for some reason:

nmcli c modify hotspotname wifi-sec.pmf 1

You need to enable forwarding packages:

sudo iptables -t filter -P FORWARD ACCEPT

Show QR code and data:

nmcli dev wifi show-password

There you go.