Original post : https://unix.stackexchange.com/a/310699
nmcli con add type wifi ifname wlp0s20f3 con-name delirehberiwifi autoconnect yes ssid delirehberiwifi
nmcli con modify delirehberiwifi 802-11-wireless.mode ap 802-11-wireless.band bg ipv4.method shared
nmcli con modify delirehberiwifi wifi-sec.key-mgmt wpa-psk
nmcli con modify delirehberiwifi wifi-sec.psk "deliloy1542"
nmcli con up delirehberiwifi
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