Create Wi-Fi Hotspot on Linux using nmcli

create-hotspot.md

Create a Wi-Fi hotspot on Linux using nmcli

Original post : https://unix.stackexchange.com/a/310699

nmcli con add type wifi ifname wlan0 con-name Hostspot autoconnect yes ssid Hostspot
nmcli con modify Hostspot 802-11-wireless.mode ap 802-11-wireless.band bg ipv4.method shared
nmcli con modify Hostspot wifi-sec.key-mgmt wpa-psk
nmcli con modify Hostspot wifi-sec.psk "veryveryhardpassword1234"
nmcli con up Hostspot

Note

If after reboot nmcli con up Hotspot doesn't work

Use this command instead to start Hotspot

UUID=$(grep uuid /etc/NetworkManager/system-connections/Hotspot | cut -d= -f2)
nmcli con up uuid $UUID

Correct me if I'm wrong, but I think adding the following uses WPA2:

nmcli con modify Hostspot wifi-sec.group ccmp
nmcli con modify Hostspot wifi-sec.pairwise ccmp

and for WPA3 maybe something like this:

nmcli con modify Hostspot wifi-sec.key-mgmt sae

(Note: intentional misspelling of hotspot as Hostspot to match OP)

for those who can create their hotspot but don't have internet through it:
symlink iptables to /sbin/iptables
and it should work.

Whenever I try the first line, I get
Error: Failed to add 'Hostspot' connection: failure adding connection: keyfile writer produces an invalid connection: cannot access file: No such file or directory
I'm on Ubuntu Core. Any help would be much appreciated.