参考: https://askubuntu.com/questions/318973/how-do-i-create-a-wifi-hotspot-sharing-wireless-internet-connection-single-adap
Simple steps: Create wifi hotspot in ubuntu
Disable Wifi (Uncheck Enable Wi-Fi)
Go to network connection (Edit Connections...)
Click "Add"
Choose "Wi-Fi" and click "Create"
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Type in Connection name like "wifi-hotspot"
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Type in SSID as you wish
Choose Device MAC Address from the dropdown (wlan0)
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Wifi Security select "WPA & WPA2 Personal" and set a password.
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Go to IPv4 Settings tab, from Method drop-down box select Shared to other computers.
Then save and close.
Open Terminal (Ctrl+Alt+T) and type in the following command with your connection name used in step 5.
sudo gedit /etc/NetworkManager/system-connections/wifi-hotspot
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Find mode=infrastructure and change it to mode=ap
- able the Wifi
Now check the network section where wi-fi will be connected to the created hotspot with the name of SSID. (If you can not find it, go to Connect to Hidden Network).
