Ubuntu – How to set up a Wi-Fi hot-spot on Ubuntu 17.04

when I start AP-hot spot it says already a process is running and if I stop and try to start again it says another process already running again

Your command prompt should look like this,

$ sudo ap-hotspot start
Another process is already running
$ sudo ap-hotspot stop
Wireless Hotspot is not active

In this case whatever command you try, won't work. It would display the same error like above.

For this you have to remove hotspot.pid file present inside /tmp directory. So that only it would work.

sudo rm /tmp/hotspot.pid

And then try to start ap-hotspot by running,

sudo ap-hotspot start

To stop,

sudo ap-hotspot stop

To configure,

sudo ap-hotspot configure

I hope this article can help with your problem.

How to Overcome Ubuntu 17.04 Failed to Make Wifi Hotspot

1. If Hotspot is on then turn it off first. Go to System Settings > Network

   Turn off Hotspot by clicking ON so it becomes OFF

   Click Stop Hotspot

2. Click All Settings > Software and Updates

   Make sure the settings shown are checked.

   

3. Click the Close button and let Ubuntu 17.04 update after entering the password. Wait for it to finish. Click Reload.

4. Press Ctrl+Alt+T to start the Terminal application.

5. Type the following command in Terminal:

   sudo apt install hostapd dnsmasq
   

6. Go back to the Network window and click Use as Hotspot then click Turn On.

   Hotspot is ON with the name HP-EliteBook-2760p (on my computer)

7. In order for Android devices to be able to connect to this Hotspot, there is still one more step, namely:

   Click Edit Connections

   Select Hotspot then click Edit

   Change Mode to Hotspot (provided Ad-hoc)

   Click Save

   Click Enable Wi-Fi to disable your Wi-Fi

   Click again Enable Wi-Fi to enable Wi-Fi

And…. Alhamdulillah ... now Hotspot on Ubuntu 17.04 can function normally. Android devices can also connect.