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
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
In archlinux to share the wired internet via wifi, the dnsmasq packet is required for the network to lift properly.
It is also possible to create the network in a single command.
And then just lift the network.
$ nmcli con up $CON_NAME
We check that the wired network is sharing the internet via wifi.
I also have a script that automates the procedure. For more information I also have a post on my Telegram channel dedicated to the topic.